CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)
Balance, shares at Dec. 31, 2019		1,725,000
Balance, amount at Dec. 31, 2019	$ 11,083,000	$ 16,000	$ 16,039,000	$ (4,972,000)
Issuance of common stock, net, shares		5,000
Issuance of common stock, net, amount	20,000	$ 0	20,000	0
Vesting of restricted stock units offset by repurchase of common stock upon vesting of restricted stock units and awards, shares		16,000
Vesting of restricted stock units offset by repurchase of common stock upon vesting of restricted stock units and awards, amount	(1,000)	$ 1,000	(2,000)	0
Value of stock-based compensation	172,000	0	172,000	0
Common stock issued for accrued liabilities	9,000	$ 0	9,000
Restricted stock award issuance, shares		2,000
Restricted stock award issuance, amount	0	$ 0	0	0
Net loss	(4,615,000)	$ 0	0	(4,615,000)
Balance, shares at Dec. 31, 2020		1,748,000
Balance, amount at Dec. 31, 2020	6,668,000	$ 17,000	16,238,000	(9,587,000)
Issuance of common stock, net, shares		6,000
Issuance of common stock, net, amount	27,000	$ 1,000	26,000	0
Value of stock-based compensation	232,000	0	232,000	0
Net loss	(3,534,000)	$ 0	0	(3,534,000)
Repurchase of common stock upon vesting of restricted stock units, shares		28,000
Repurchase of common stock upon vesting of restricted stock units, amount	(200,000)	$ 0	(200,000)	0
Balance, shares at Dec. 31, 2021		1,782,000
Balance, amount at Dec. 31, 2021	$ 3,193,000	$ 18,000	$ 16,296,000	$ (13,121,000)