Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	16,316,000		769,000
Balance at Dec. 31, 2017	$ 2,000	$ 68,886,000	$ (1,536,000)	$ (67,657,000)	$ (305,000)
Cancellation of restricted stock (in shares)	(30,000)
Cancellation of restricted stock
Treasury stock repurchased (in shares)			8,000		7,989
Treasury stock repurchased			$ (6,000)		$ (6,000)
Issuance of shares on option exercise (in shares)	90,000				90,000
Issuance of shares on option exercise		9,000			$ 9,000
Issuance of shares on warrant exercise (in shares)	1,144,000
Issuance of shares on warrant exercise		105,000			105,000
Stock-based compensation		241,000			241,000
Net income for the year				2,437,000	2,437,000
Balance (in shares) at Dec. 31, 2018	17,520,000		777,000
Balance at Dec. 31, 2018	$ 2,000	69,241,000	$ (1,542,000)	(65,220,000)	$ 2,481,000
Treasury stock repurchased (in shares)			185,000		185,112
Treasury stock repurchased			$ (158,000)		$ (158,000)
Issuance of shares on option exercise (in shares)	614,000				604,000
Issuance of shares on option exercise		62,000			$ 62,000
Stock-based compensation		358,000			358,000
Net income for the year				126,000	126,000
Restricted stock vested (in shares)	390,000
Restricted stock vested
Balance (in shares) at Dec. 31, 2019	18,524,000		962,000
Balance at Dec. 31, 2019	$ 2,000	$ 69,661,000	$ (1,700,000)	$ (65,094,000)	$ 2,869,000