CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 15,852	$ 23,385
Accounts receivable	2,297	1,496
Current portion of notes receivable, net	2,036	1,338
Inventory – equipment	91	235
Other current assets	447	498
Total current assets	20,723	26,952
Non-current portion of notes receivable, net	1,565	748
Equity method investments	2,402	2,402
Right-of-use assets	830	963
Property and equipment, net	132	130
Intangible assets, net	3,056	3,123
Goodwill	5,585	5,585
Deferred tax assets	4,450	4,402
Other assets	246	250
Total assets	38,989	44,555
Current liabilities:
Accounts payable and accrued liabilities	7,202	13,609
Current portion of lease liabilities	301	380
Total current liabilities	7,503	13,989
Non-current portion of lease liabilities	564	623
Total liabilities	8,067	14,612
Stockholders’ equity:
Preferred stock, $10.00 par value, authorized 10,000,000 shares; issued and outstanding 568 shares of Series N as of March 31, 2021 and December 31, 2020	6	6
Common stock, $0.01 par value, authorized 300,000,000 shares; issued and outstanding 35,647,477 shares as of March 31, 2021 and 35,281,183 as of December 31, 2020	357	353
Additional paid-in capital	293,343	293,400
Accumulated deficit	(262,784)	(263,816)
Total stockholders’ equity	30,922	29,943
Total liabilities and stockholders’ equity	$ 38,989	$ 44,555