CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 17,525	$ 23,385
Accounts receivable	2,514	1,496
Current portion of notes receivable, net	1,086	1,338
Inventory – equipment	161	235
Other current assets	676	498
Total current assets	21,962	26,952
Non-current portion of notes receivable, net	1,225	748
Equity method investments	2,893	2,402
Right-of-use assets	2,940	963
Property and equipment, net	108	130
Intangible assets, net	2,989	3,123
Goodwill	5,585	5,585
Deferred tax assets	4,933	4,402
Other assets	161	250
Total assets	42,796	44,555
Current liabilities:
Accounts payable and accrued liabilities	8,834	13,609
Current portion of lease liabilities	494	380
Total current liabilities	9,328	13,989
Non-current portion of lease liabilities	2,485	623
Total liabilities	11,813	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 June 30, 2021 and December 31, 2020	6	6
Common stock, $0.01 par value, authorized 300,000,000 shares; issued and outstanding 36,284,382 shares as of June 30, 2021 and 35,281,183 as of December 31, 2020	363	353
Additional paid-in capital	292,811	293,400
Accumulated deficit	(262,197)	(263,816)
Total stockholders’ equity	30,983	29,943
Total liabilities and stockholders’ equity	$ 42,796	$ 44,555