Thanks, Steve. First, let me say that during the quarter, we adopted Accounting Standard Update 2014-09 which relates to revenue from contracts with customers, Topic 606, on January 1, 2018, using the full retrospect application. Financial results for the prior periods have been adjusted by our adoption of Topic 606 to be comparable with current period financial results.
Our consolidated revenue for the first quarter 2018 increased 22% to $2.8 million compared to $2.3 million for the first quarter of the prior year. Approximately 92% of our revenue was derived from our Cloud Telecommunications segment which contributed $2.6 million for the quarter. That's an increase of 28% compared to $2.0 million contributed in the first quarter of the prior year. Our service revenue for the first quarter of '18 increased 21% to $2.4 million compared to $2.0 million reported for the first quarter of the prior year.
Product revenue for the first quarter of 2018 increased 31% to $366,000 compared to $279,000 for the first quarter of the prior year. Operating expenses on a consolidated basis for the first quarter of 2018 increased slightly by $96,000 to $2.9 million compared to $2.8 million for the first quarter of the prior year.
On a GAAP basis, the company reported a net loss of only $63,000 or a breakeven diluted per common share compared to a net loss of $515,000 or a $0.04 loss per diluted common share for the first quarter of the prior year. On a non-GAAP basis, net income for the first quarter was $17,000 or breakeven per diluted common share compared to a non-GAAP net loss of $160,000 or a $0.01 loss per diluted common share for the same period of the prior year.
EBITDA for the first quarter was a loss of $44,000 compared to a loss of $454,000 for the same period of the prior year. Adjusted EBITDA for the quarter was $18,000 compared to a loss of $156,000 for the same period of the prior year. Our cash, cash equivalents and restricted cash at March 31, 2018, was $1.2 million compared to $1.1 million at the end of the first quarter of 2017. During the quarter, operating activities used $127,000 of cash, cash equivalents and restricted cash. Investing activities had no impact on cash, cash equivalents and restricted cash. And our financing activity has used $38,000 of our cash, cash equivalents and restricted cash.
With that, I'll turn it over to Doug Gaylor, our President and COO, for additional comments.