Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities
Net income (loss)	$ 66	$ (612)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	2,485	1,620
Stock-based compensation expense	1,463	1,562
Deferred taxes	(86)	(636)
Changes in operating assets and liabilities:
Accounts receivable	3,017	4,334
Prepaid expenses and other current assets	805	(665)
Deferred commissions and other assets	418	211
Accounts payable	(392)	(719)
Accrued liabilities	(6,521)	(844)
Deferred revenues	(3,101)	(1,835)
Net cash (used in) provided by operating activities	(1,846)	2,416
Cash flows from investing activities
Addition of capitalized software development costs	(1,308)	(1,079)
Purchase of property and equipment	(174)	(887)
Purchase of available-for-sale short-term investments		(12,425)
Maturities of available-for-sale short-term investments		6,560
Net cash used in investing activities	(1,482)	(7,831)
Cash flows from financing activities
Proceeds from exercise of common stock options	292	340
Net cash provided by financing activities	292	340
Effect of exchange rate changes on cash and cash equivalents	(14)	(10)
Net decrease in cash and cash equivalents	(3,050)	(5,085)
Cash and cash equivalents at beginning of period	19,117	15,606
Cash and cash equivalents at end of period	$ 16,067	$ 10,521