Consolidated Balance Sheets (Parenthetical) $ in Thousands	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Trade accounts receivable | $	$ 20	$ 26
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Preferred stock authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	876,447	876,447
Preferred stock, shares outstanding (in shares)	876,447	876,447
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Common stock authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	4,348,690	1,406,920
Common stock, shares outstanding (in shares)	4,348,690	1,406,920
Convertible Preferred Stock
Preferred stock authorized (in shares)	3,300,000	3,300,000