Consolidated Statements of Shareholders’ Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	14,290,749
Balance at Dec. 31, 2017	$ 143,000	$ 5,415,000	$ (458,000)	$ 26,223,000	$ 31,323,000
Common stock repurchased and retired (in shares)	(999,900)				(999,900)
Common stock repurchased and retired	$ (10,000)	(3,570,000)			$ (3,580,000)
Share-based compensation expense		432,000			$ 432,000
Options exercised (in shares)	211,835				211,835
Options exercised	$ 2,000	392,000			$ 394,000
Net income				3,625,000	$ 3,625,000
Balance (in shares) at Dec. 31, 2018	13,502,684				13,502,684	[1]
Balance at Dec. 31, 2018	$ 135,000	2,669,000		29,390,000	$ 32,194,000	[2]
Cumulative-effect adjustment of change in accounting for unrealized loss on marketable securities			458,000	(458,000)
Common stock repurchased and retired (in shares)	(683,910)				(683,910)
Common stock repurchased and retired	$ (6,000)	(2,542,000)			$ (2,548,000)
Share-based compensation expense		451,000			$ 451,000
Options exercised (in shares)	66,499				66,499
Options exercised		130,000			$ 130,000
Net income				3,000,000	$ 3,000,000
Balance (in shares) at Dec. 31, 2019	12,885,273				12,885,273
Balance at Dec. 31, 2019	$ 129,000	$ 708,000		$ 32,390,000	$ 33,227,000

[1] The condensed consolidated balance sheet as of December 31, 2018 has been prepared using information from the audited consolidated balance sheet as of that date.

[2] The condensed consolidated balance sheet as of December 31, 2018 has been prepared using information from the audited consolidated balance sheet as of that date.