Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	12,973,145	12,972,815
Common stock, shares outstanding	12,973,145	12,972,815
Common stock subscribed and not yet issued	0	80
Series A Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized	10,000,000	10,000,000
Redeemable convertible preferred stock, shares issued	100,000	100,000
Redeemable convertible preferred stock, shares outstanding	100,000	100,000
Accrued and undeclared dividends	$ 134	$ 98
Redeemable convertible preferred stock, liquidation preference	$ 434	$ 398
Series B Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized	3,075,000	3,075,000
Redeemable convertible preferred stock, shares issued	2,050,000	2,050,000
Redeemable convertible preferred stock, shares outstanding	2,050,000	2,050,000
Accrued and undeclared dividends	$ 1,090	$ 475
Redeemable convertible preferred stock, liquidation preference	$ 7,240	$ 6,625
Redeemable Common Stock [Member]
Redeemable equity at redemption value	2,240,000	2,240,000