Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss for the period	$ (14,584)	$ (54,963)	$ (53,668)
Adjustments:
Depreciation and amortization	8,934	15,119	14,513
Impairment charge on Rock Hill Facility	8,716	0	0
Stock-based compensation, net of settlements	2,306	3,342	4,248
Foreign exchange loss (gain)	1,099	(1,813)	112
Gain on sale of software and patents	(7,130)	0	0
Loss (gain) on disposal of equipment	153	(133)	12
Accretion of convertible debentures	698	676	352
Deferred income tax recovery	0	0	(414)
Goodwill impairment	0	0	1,443
Changes in operating assets and liabilities:
Trade and accrued receivables	(1,833)	(179)	(2,118)
Other receivables	7,406	(4,432)	3,570
Inventory	5,961	(4,716)	(2,449)
Prepaid and other assets, current and long term	474	129	(1,132)
Accounts payable and accrued liabilities	2,137	260	2,702
Other liabilities	(421)	(109)	(213)
Customer deposits and deferred revenue	243	2,477	601
Current portion of long-term debt and accrued interest	(40)	(149)	948
Lease liabilities	702	231	283
Net cash flows provided by (used in) operating activities	14,821	(44,260)	(31,210)
Cash flows from investing activities:
Purchase of property, plant and equipment, net of accounts payable changes	(1,242)	(2,394)	(11,781)
Capitalized software development expenditures	(1,794)	(1,677)	(2,340)
Other asset expenditures	(398)	(443)	(496)
Recovery of software development expenditures	127	263	461
Proceeds on sale of software and patents	10,950	0	0
Proceeds on sale of equipment	14	227	18
Net cash flows provided by (used in) investing activities	7,657	(4,024)	(14,138)
Cash flows from financing activities:
Proceeds received on long-term debt	0	647	64,912
Repayment of long-term debt	(11,579)	(2,470)	(1,808)
Proceeds issued on private placement	0	1,990	0
Employee tax payments on vesting of RSUs	(26)	(1,041)	(652)
Net cash flows (used in) provided by financing activities	(11,605)	(874)	62,452
Effect of foreign exchange on cash, cash equivalents and restricted cash	(13)	(11)	458
Net increase (decrease) in cash, cash equivalents and restricted cash	10,860	(49,169)	17,562
Cash, cash equivalents and restricted cash, beginning of year	14,239	63,408	45,846
Cash, cash equivalents and restricted cash, end of year	25,099	14,239	63,408
Supplemental disclosure of cash flow information:
Interest paid	(3,977)	(4,423)	(1,543)
Income taxes received	$ (4)	$ 3,212	$ 433