Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (2,434)	$ 202
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	141	153
Stock-based compensation	331	399
Changes in operating assets and liabilities:
Accounts receivable, net	1,302	5,078
Contract assets, current	3	203
Prepaid expenses and other assets	(359)	(617)
Third-party software fees payable	142	(5,720)
Accounts payable and accrued expenses	(27)	(41)
Deferred revenue	(2,266)	(1,804)
Deferred rent	(83)	(76)
Net cash used in operating activities	(3,250)	(2,223)
Cash flows from investing activities:
Purchases of equipment and furniture	(82)	(83)
Proceeds from maturities of short-term investments	6,125	9,750
Purchases of short-term investments	(4,983)	(12,146)
Net cash provided by (used in) investing activities	1,060	(2,479)
Cash flows provided by financing activities:
Proceeds from exercise of stock options	12	91
Effect of exchange rates on cash	11	3
Net decrease in cash and cash equivalents	(2,167)	(4,608)
Cash and cash equivalents, beginning of period	12,859	14,312
Cash and cash equivalents, end of period	$ 10,692	$ 9,704