CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 38,660	$ 100,575
Restricted cash	664	663
Accounts receivable, net of allowance for doubtful accounts of $1,316 and $1,527 at December 31, 2020 and 2019, respectively	11,764	15,638
Inventories, net	11,837	23,210
Income taxes receivable	403	631
Other current assets	3,127	13,191
Total current assets	66,455	153,908
Property and equipment, net	9,087	39,829
Operating lease right-of-use assets	2,320	16,388
Goodwill	8,092	0
Deferred tax assets, net	223	152
Other intangible assets, net	0	20,323
Other long-term assets	33	0
TOTAL ASSETS	86,210	230,600
Current liabilities:
Accounts payable	5,787	16,231
Accrued liabilities	18,275	24,552
Income taxes payable	21	0
Interest payable	34	0
Current portion of operating lease liabilities	636	486
Current portion of finance lease liabilities	60	55
Current portion of long-term debt	4,048	0
Total current liabilities	28,861	41,324
Deferred revenue, long-term	117	0
Long-term operating lease liabilities	8,348	16,973
Long-term finance lease liabilities	96	158
Long-term debt	1,617	0
Deferred tax liabilities, net	0	116
TOTAL LIABILITIES	39,039	58,571
Commitments and contingencies (Note 16)
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; 78,669,414 shares issued and 73,088,494 shares outstanding at December 31, 2020; 63,656,897 shares issued and 59,511,416 shares outstanding at December 31, 2019	8	6
Additional paid-in capital	359,721	347,564
Accumulated other comprehensive (loss) income	(19)	181
Accumulated deficit	(278,688)	(142,238)
Treasury stock, at cost; 5,580,920 and 4,145,481 shares at December 31, 2020 and 2019, respectively	(33,851)	(33,484)
Total stockholders’ equity	47,171	172,029
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 86,210	$ 230,600