Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net loss	$ (13,227,642)	$ (10,382,059)	$ (9,258,647)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,285,902	843,387	184,946
Share-based compensation	872,177	263,396	122,134
Gain on disposal of equipment	(12,133)	(13,233)	(941)
Loss on asset held for sale	149,800	0	0
Impairment loss	103,116	0	0
Other non-cash charges	0	(1,364)	0
Changes in operating assets and liabilities:
Other receivables	65,002	56,212	(11,440)
Inventory	(1,154,222)	93,956	(169,991)
Prepaid expenses and other assets	59,942	289,868	(592,602)
Accounts payable, accrued liabilities and other liabilities	609,311	(966,928)	625,763
Net cash used in operating activities	(11,248,747)	(9,816,765)	(9,100,778)
Investing activities
Purchase of property, plant and equipment	(2,316,809)	(4,009,736)	(18,893,264)
Deposits on equipment purchases	(160,675)	(95,001)	(153,663)
Proceeds from sale of equipment	15,848	23,233	941
Net cash used in investing activities	(2,461,636)	(4,081,504)	(19,045,986)
Financing activities
Proceeds from issuance of debt	900,767	771,858	256,807
Repayment of term debt	(85,802)	(55,615)	(35,812)
Proceeds from the issuance of common stock and warrants, net	12,395,348	10,616,046	24,989,257
Proceeds from exercise of stock options and warrants, net	272,417	5,116,533	27,502
Net cash provided by financing activities	13,482,730	16,448,822	25,237,754
Effect of exchange rate changes on cash and cash equivalents	23,840	(54,279)	80,018
Net change in cash and cash equivalents	(203,813)	2,496,274	(2,828,992)
Cash and cash equivalents at beginning of period	3,002,557	506,283	3,335,275
Cash and cash equivalents at the end of period	2,798,744	3,002,557	506,283
Supplemental disclosure of cash flow information and non-cash transactions:
Interest paid in cash	62,988	22,257	21,537
Property and equipment included in accounts payable and accrued liabilities	210,270	193,378	1,036,240
Acquisition of equipment under debt arrangement	$ 0	$ 74,068	$ 0