CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 44	$ 62
Notes receivable, allowance	7	7
Notes and other receivables, long-term, allowance	$ 24	$ 26
Temporary equity, par value per share	$ 0.01	$ 0.01
Temporary equity, shares authorized	20,000	20,000
Temporary equity, shares issued	20,000	20,000
Temporary equity, shares outstanding	20,000	20,000
Temporary equity, aggregate liquidation preference	$ 20,000	$ 20,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,980,000	9,980,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	11,395,000	11,327,000
Common stock, shares outstanding	11,395,000	11,327,000