Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 24,295	$ 9,452
Marketable securities	5,037	62,351
Restricted cash	150	150
Accounts receivable	860	263
Inventory	12,266	8,424
Deferred offering costs	2,506
Prepaid expenses and other current assets	1,323	1,816
Total current assets	46,437	82,456
Property and equipment, net	7,584	4,427
Right-of-use asset, net	2,005	2,341
Intangible assets, net	3,890	4,110
Goodwill	12,026	12,026
Other assets	87	95
Total assets	72,029	105,455
Current liabilities:
Accounts payable	9,084	3,882
Accrued liabilities	7,036	10,076
Contingent consideration, short-term	3,500	8,200
Operating lease liabilities, short-term	882	833
Common and preferred stock warrant liability	10,791	8,919
Total current liabilities	31,293	31,910
Operating lease liabilities, long-term	1,594	2,054
Long-term debt	38,558	38,244
Contingent consideration, long-term	4,000	5,700
Total liabilities	75,445	77,908
Commitments and contingencies (Note 11)
Stockholders' deficit
Common stock, $0.001 par value; 260,000,000 shares authorized as of each of June 30, 2020 and December 31, 2019; 775,403 and 695,902 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	36,355	33,252
Accumulated deficit	(300,325)	(259,034)
Accumulated other comprehensive loss	(2)	(30)
Total stockholders' deficit	(263,971)	(225,811)
Total liabilities, convertible preferred stock and stockholders' deficit	72,029	105,455
Series A Convertible Preferred Stock [Member]
Convertible preferred stock
Convertible preferred stock	3,059	3,059
Series B Convertible Preferred Stock [Member]
Convertible preferred stock
Convertible preferred stock	40,685	40,685
Series C Convertible Preferred Stock [Member]
Convertible preferred stock
Convertible preferred stock	74,575	74,575
Series D Convertible Preferred Stock [Member]
Convertible preferred stock
Convertible preferred stock	$ 142,236	$ 135,039