Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (29,136,000)	$ (2,834,000)	$ (4,060,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	3,164,000	4,202,000	1,708,000
Provision for doubtful accounts		104,000	67,000
Deferred income taxes	20,423,000	5,001,000	3,137,000
Share-based compensation	1,022,000	1,286,000	1,593,000
Excess tax benefits from stock options		(732,000)	(295,000)
(Gain) loss on disposal of fixed assets	30,000	(13,000)	(10,000)
Accretion of contingent earnout consideration	295,000	2,182,000	1,710,000
Change in fair value of contingent earnout consideration	(252,000)	(725,000)
Changes in operating accounts, net of acquisitions:
Accounts receivable	3,337,000	1,960,000	1,548,000
Prepaid expenses and other current assets	(867,000)	(504,000)	(286,000)
Other assets	11,000	3,000	(8,000)
Accounts payable	133,000	48,000	100,000
Accrued liabilities	(1,455,000)	(3,659,000)	(1,697,000)
Deferred revenue	329,000	(617,000)	(246,000)
Net cash (used in) provided by operating activities	(2,966,000)	5,702,000	3,261,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(176,000)	(377,000)	(333,000)
Net cash used in investing activities	(176,000)	(470,000)	(24,467,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from employee stock purchase plans and stock option exercises	5,219,000	3,964,000	1,488,000
Payment of contingent earnout consideration	(5,189,000)	(2,214,000)
Borrowings under revolving credit facility			5,000,000
Excess tax benefits from stock options		732,000	295,000
Purchases of treasury stock	(1,286,000)		(332,000)
Net cash (used in) provided by financing activities	(1,256,000)	2,482,000	6,451,000
Effects of exchange rates on cash	103,000	(2,000)	(32,000)
Change in cash and cash equivalents	(4,295,000)	7,712,000	(14,787,000)
CASH AND CASH EQUIVALENTS, beginning of period	19,693,000	11,981,000	26,768,000
CASH AND CASH EQUIVALENTS, end of period	15,398,000	19,693,000	11,981,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest	142,000	102,000	18,000
Cash paid for income taxes	606,000	220,000	208,000
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Issuance of restricted stock awards	108,000		728,000
Zero2Ten [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash used to acquire Branchbird			(4,643,000)
Branchbird [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash used to acquire Branchbird			(2,755,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment of contingent earnout consideration	$ 0
M2 Dynamics [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash used to acquire Branchbird		$ (93,000)	$ (16,736,000)