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, 2018	13,502,684
Balance at Dec. 31, 2018	$ 135,000	$ 2,669,000	$ 29,390,000	$ 32,194,000
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	$ 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	$ 33,227,000
Common stock repurchased and retired (in shares)	(223,100)				(223,100)
Common stock repurchased and retired	$ (2,000)	(2,664,000)		(2,666,000)
Share-based compensation expense		375,000		375,000
Options exercised (in shares)	757,674				757,674
Options exercised	$ 8,000	1,990,000		1,998,000
Net income			27,086,000	27,086,000	$ 27,086,000
Balance (in shares) at Dec. 31, 2020	13,419,847				13,419,847
Balance at Dec. 31, 2020	$ 135,000	$ 409,000	$ 59,476,000	$ 60,020,000	$ 60,020,000