CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (13,797)	$ (9,586)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,540	533
Stock-based compensation	2,909	2,314
Change in fair value of warrant liability		211
Amortization of debt discount		910
Accrued interest expense	13	416
Amortization of lease right-of-use assets	256	120
Change in operating lease liabilities	(242)	(117)
Other	154	41
Changes in assets and liabilities:
Accounts receivable	(791)	518
Inventories	(561)	21
Tax credits and receivables	29	(554)
Prepaid expenses and other assets	(360)	(100)
Accounts payable	474	(403)
Deferred revenue and other liabilities	(1,186)	25
Net cash used in operating activities	(11,562)	(5,651)
Cash flows from investing activities:
Purchases of property and equipment	(342)	(52)
Purchases of intangible assets	(21)	(95)
Proceeds from maturities of marketable securities	9,434
Purchases of marketable securities	(497)
Net cash provided by (used in) investing activities	8,574	(147)
Cash flows from financing activities:
Taxes paid to net share settle equity awards	(59)
Payment of lease obligation	(26)
Proceeds from exercise of stock options		30
Net proceeds from loan facility		552
Net proceeds from convertible debenture		5,545
Net cash provided by (used in) financing activities	(85)	6,127
Net increase (decrease) in cash and cash equivalents	(3,073)	329
Cash and cash equivalents at beginning of period	5,893	1,711
Cash and cash equivalents at end of period	2,820	2,040
Supplemental disclosure:
Recognition of right-of-use assets and lease liabilities	995
Unrealized loss on available-for-sale securities	$ 41
Fair value of new warrants issued recognized as debt discount		$ 2,604