CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 874	$ 769
Net investment in leases, current	$ 137	$ 192
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding	0	0
Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	13,250,000	13,250,000
Common stock, shares issued	0	0
Common stock, shares outstanding	0	0
Public Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	13,250,000	13,250,000
Common stock, shares issued	10,712,347	9,475,845
Common stock, shares outstanding	10,712,347	9,475,845