Condensed Consolidated Statements of Stockholders Equity - USD ($) shares in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock
Balance, shares at Dec. 31, 2019		13,929,381
Balance, amount at Dec. 31, 2019	$ 23,276,000	$ 8,357,000	$ 26,095,000	$ (6,043,000)	$ (5,133,000)
Change in inventory accounting method	1,158,000	$ 0	0	1,158,000	0
Balance, shares at Jan. 01, 2020		13,929,381
Balance, amount at Jan. 01, 2020	24,434,000	$ 8,357,000	26,095,000	(4,885,000)	0
Balance, shares at Dec. 31, 2019		13,929,381
Balance, amount at Dec. 31, 2019	$ 23,276,000	$ 8,357,000	26,095,000	(6,043,000)	(5,133,000)
Common stock issued-restricted stock units, shares	128	32,985
Common stock issued-restricted stock units, amount	$ 0	$ 20,000	(20,000)	0	0
Share-based compensation expense-stock options	129,000	0	129,000	0	0
Shared-based compensation expense-restricted stock units	142,000	0	142,000	0	0
Dividends declared ($0.08 per share)	1,002,000	0	0	1,002,000	0
Net income	194,000	0	0	194,000	0
Repurchased of common stock	(269,000)	$ 0	0	0	(269,000)
Balance, shares at Dec. 31, 2020		13,962,366
Balance, amount at Dec. 31, 2020	$ 23,628,000	$ 8,377,000	26,346,000	(5,693,000)	(5,402,000)
Common stock issued-restricted stock units, shares	298	87,383
Common stock issued-restricted stock units, amount	$ 0	$ 53,000	(53,000)
Share-based compensation expense-stock options	253,000	0	253,000	0	0
Dividends declared ($0.08 per share)	1,427,000	0	0	1,427,000	0
Net income	(1,701,000)	$ 0	0	(1,701,000)	0
Common stock issued net of issuance cost, shares		4,249,250
Common stock issued net of issuance cost, amount	11,559,000	$ 2,549,000	9,010,000	0	0
Shared-based compensation expense-restricted stock units	306,000	$ 0	306,000	0	0
Balance, shares at Dec. 31, 2021		18,298,999
Balance, amount at Dec. 31, 2021	$ 32,618,000	$ 10,979,000	$ 35,862,000	$ (8,821,000)	$ (5,402,000)