CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 11,534	$ 38,660
Restricted cash	1,790	664
Accounts receivable, net of allowance for doubtful accounts of $659 and $1,316 at December 31, 2021 and December 31, 2020, respectively	13,297	11,764
Inventories, net	9,454	11,837
Income taxes receivable	22	403
Other current assets	3,740	3,127
Assets held for sale	2,762	0
Total current assets	42,599	66,455
Property and equipment, net	5,296	9,087
Operating lease right-of-use assets	2,041	2,320
Goodwill	0	8,092
Deferred tax assets, net	279	223
Other long-term assets	29	33
TOTAL ASSETS	50,244	86,210
Current liabilities:
Accounts payable	7,616	5,787
Accrued liabilities	8,996	18,275
Income taxes payable	4	21
Interest payable	82	34
Current portion of operating lease liabilities	602	636
Current portion of finance lease liabilities	41	60
Current portion of long-term debt	1,436	4,048
Total current liabilities	18,777	28,861
Deferred revenue, long-term	91	117
Long-term operating lease liabilities	7,779	8,348
Long-term finance lease liabilities	53	96
Long-term debt	3,352	1,617
TOTAL LIABILITIES	30,052	39,039
Commitments and contingencies (See Note 15)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 100,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.0001 par value, 140,000,000 shares authorized; 79,483,837 shares issued and 73,461,203 shares outstanding at December 31, 2021; 78,669,414 shares issued and 73,088,494 shares outstanding at December 31, 2020	8	8
Additional paid-in capital	363,417	359,721
Accumulated other comprehensive income (loss)	81	(19)
Accumulated deficit	(309,214)	(278,688)
Treasury stock, at cost; 6,022,634 and 5,580,920 shares at December 31, 2021 and December 31, 2020, respectively	(34,100)	(33,851)
Total stockholders’ equity	20,192	47,171
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 50,244	$ 86,210