Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 43,931	$ 74,394
Accounts receivable, net	4,234	2,683
Inventory	7,658	3,907
Prepaid expenses and other assets	3,232	2,241
Total current assets	59,055	83,225
Property and equipment, net	1,186	626
Intangible assets, net	2,303	2,607
Total assets	62,544	86,458
Current liabilities:
Accounts payable	2,414	652
Accrued expenses and other current liabilities	8,161	5,953
Total current liabilities	10,575	6,605
Longterm debt with related party	31,491	30,827
Other longterm liabilities	380
Total liabilities	42,446	37,432
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock; $0.001 par value: 10,000,000 shares authorized; no shares issued and outstanding
Common stock; $0.001 par value: 200,000,000 shares authorized; 14,529,606 and 14,437,289 shares issued and 14,529,577 and 14,437,107 shares outstanding at December 31, 2021 and December 31, 2020, respectively	15	14
Additional paid-in capital	250,064	245,736
Accumulated other comprehensive loss	(52)	(71)
Accumulated deficit	(229,929)	(196,653)
Total stockholders' equity	20,098	49,026
Total liabilities and stockholders' equity	$ 62,544	$ 86,458