CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 405	$ 635
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	132	162
Stock-based compensation	71	8
Deferred tax provision (benefit) on other comprehensive income	(14)	1
Amortization of discount on investments	(3)	(3)
Changes in assets and liabilities:
Accounts receivable	(375)	904
Prepaid expenses and other current assets	(31)	(194)
Deferred tax assets	34	127
Accounts payable	270	382
Accrued expenses	5	(129)
Accrued income taxes	36	(236)
Deferred revenue	(512)	(603)
Net cash provided by operating activities	18	1,054
Cash flows from investing activities:
Purchases of property and equipment	(5)	(5)
Net cash used in investing activities	(5)	(5)
Cash flows from financing activities:
Proceeds from issuance of common stock	13
Excess tax benefits from stock-based compensation		430
Payments made for taxes of employees who surrendered shares related to unrestricted stock	(119)	(61)
Repurchase of common stock	(2,827)
Net cash provided by (used in) financing activities	(2,933)	369
Increase (decrease) in cash and cash equivalents	(2,920)	1,418
Cash and cash equivalents, beginning of period	51,913	51,232
Cash and cash equivalents, end of period	48,993	52,650
Supplemental disclosure:
Cash paid for income taxes	$ 12	$ 275