Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2016	$ 129,000	$ 111,844,000	$ (91,498,000)	$ (103,000)	$ (4,370,000)	$ 16,002,000
Balance, shares at Dec. 31, 2016	14,578,000
Net loss			(2,996,000)			(2,996,000)
Foreign currency translation adjustment				(340,000)		(340,000)
Unrealized loss on investments				(28,000)		(28,000)
Shares issued pursuant to an underwritten public offering, net of issuance costs of $1,200,000	$ 30,000	16,035,000				16,065,000
Shares issued pursuant to an underwritten public offering, net of issuance costs of $1,200,000, shares	3,000,000
Shares issued pursuant to Keytroller acquisition	$ 3,000	1,997,000				2,000,000
Shares issued pursuant to Keytroller acquisition, shares	296,000
Shares issued pursuant to exercise of stock options	$ 3,000	1,251,000				1,254,000
Shares issued pursuant to exercise of stock options, shares	265,000
Issuance of restricted stock
Issuance of restricted stock, shares	233,000
Shares withheld pursuant to exercise of stock options and restricted stock					(429,000)	(429,000)
Forfeiture of restricted shares
Forfeiture of restricted shares, shares	(56,000)
Stock based compensation - restricted stock		1,258,000				1,258,000
Stock based compensation - options and performance shares		595,000				595,000
Balance at Sep. 30, 2017	$ 165,000	$ 132,980,000	$ (94,494,000)	$ (471,000)	$ (4,799,000)	$ 33,381,000
Balance, shares at Sep. 30, 2017	18,316,000