Net DSO for the 4th Quarter was 63 days, down three days from 66 days in Q-3 2014 and also down three days from the prior year end. The quality and aging of our receivables is very good. We ended the quarter with just over 1,070 employees, an increase of 10% sequentially versus Q-3. This increase was primarily due to incremental professional services head count associated with our acquisition of BravePoint. Taking into account the Telerik acquisition in early December, we currently have approximately 1,800 employees.
Now, I would like to review our business outlook and financial guidance for 2015. First, I want to give some color on the impact of currency movements on our 2015 outlook. The significant strengthening of the U.S. dollar during the second half of 2014, which has intensified over the past two months, creates a potentially strong headwind for us in 2015 related to currency translation of our non-US revenues. As you know, approximately 55% of our revenues are generated in market outside of North America and based on today’s current exchange rates, compared to 2014 average rates, the US dollar has increased approximately 10% against many of the currencies of the countries in which we operate. Our financial guidance reflects the current exchange rate environment and impacts our revenue outlook by approximately $17 million to $18 million. We do not expect any translation impact on Telerik revenues because the vast majority of their customers are invoiced in U.S. dollars. Keeping this in mind, we expect 2015 non-GAAP revenue to be between $425 million and $435 million, which represents a year over year increase of 28% to 31%. Although our guidance includes revenues from the Telerik and BravePoint acquisition, I want to emphasize that our business outlook is for 2015 revenues to grow by 6% to 7% on a constant currency basis, excluding the impact of revenues associated with BravePoint and Telerik. We are confident that we have momentum in all three of our business units that will result in year over year growth in bookings and revenues.
On Telerik, which will be included in our app dev business unit, our guidance reflects a continued revenue growth trajectory of over 20%. BravePoint, which is included in OpenEdge is expected to add approximately 6% to 7% growth to that business unit in 2015.
There are two other items I would like to discuss relating to our 2015 revenue guidance. The first concerns our DCI business unit revenues. If you have heard Phil and I discussed in the past, we launched DataDirect Cloud in 2014 as part of our cloud strategy and we are very pleased with the strong interest shown by several of our large DataDirect OEM customers in this product. As such, we anticipate DataDirect Cloud to be added to several OEM license renewals in 2015. This this is a very positive development to our business strategy and provides long term incremental revenues. Accounting rules require if when a SaaS product is bundled with an on-premise arrangement, the revenue related to the entire agreement must be recognize ratably [inaudible 26:59]over the contract term. We expect this ratable revenue recognition to lower our recognized revenue by approximately $3 million versus our historical revenue recognition. Despite this negative impact, we expect our DCI business unit to achieve year over year revenue growth over 2014 on a constant currency basis.
The second item relates to Telerik. As result of the acquisition, our revenue guidance for 2015 is based on non-GAAP revenue which will include acquisition related revenue adjustments. GAAP rules require us to eliminate certain pre-acquisition revenue classified by Telerik as deferred revenues. This adjustment is often referred to as a purchase accounting deferred revenue haircut. As many companies do after acquisitions, we will include pre-acquisition deferred revenue in our non-GAAP quarterly reporting, which will better reflect our true business performance on a normalized basis. Our full year 2015 guidance includes our current estimate of approximately $35 million of non-GAAP revenue. As the majority of Telerik agreements are for one year, we expect any non-GAAP revenues beyond 2015 to be minimal.
Moving to our earnings per share guidance, similar to my revenue guidance discussion, our earnings per share outlook is also impacted by the recent strengthening of the US dollar and the related currency translation impact on our non-US based revenues and income. That being said because of meaningful portion of our cost basis also denominated in foreign currencies, we get some translation benefit from the strengthening of the U.S. dollar in our cost structure. This is a natural currency translation hedge in our business based on the global diversity of our cost structure. The net negative currency translation impact of revenue in cost is expected to reduce our operating income by $8 million to $9 million and our earnings per share by $0.10 to $0.11.
