Convertible Notes (Narrative) (Details)							1 Months Ended		3 Months Ended				12 Months Ended
	Aug. 05, 2021 USD ($) $ / shares shares	Jun. 01, 2021 $ / shares	Oct. 23, 2020 USD ($) $ / shares	Oct. 15, 2020 USD ($) $ / shares	Oct. 15, 2020 USD ($) $ / shares	May 08, 2018 USD ($) $ / shares shares	May 19, 2021 USD ($) $ / shares	Oct. 23, 2020 USD ($) $ / shares	Mar. 31, 2022 CAD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 CAD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Jun. 25, 2020 $ / shares	Jun. 25, 2020 $ / shares	Dec. 31, 2017 CAD ($)	Dec. 31, 2017 USD ($)	Jul. 12, 2017 CAD ($) $ / shares	Jul. 12, 2017 USD ($) $ / shares
Debt Instrument [Line Items]
Debt instrument, face amount																$ 7,600,000	$ 6,082,000	$ 6,838,000	$ 5,472,000
Convertible notes, conversion price | (per share)						$ 0.80								$ 1.35	$ 1.08			$ 1.35	$ 1.08
Commission paid to agents						$ 157,800
Warrants issued during period, value						$ 50,000
Accretion expense										$ 91,000		$ 138,000
Stock Issued During Period, Shares, Conversion of Units | shares						320
Subscription Price of Units						$ 10,000
Common stock issued in units | shares						7,940
Stock Issued During Period, Value, Conversion of Units						$ 3,200,000
Stock Issued During Period, Value, Conversion of Convertible Securities									$ 40,000	32,000	$ 240,000	191,000
Sale of Stock, Price Per Share | $ / shares						$ 0.80
Stock Issued During Period, Shares, Issued for Services | shares						243,275
Equity Issuance, Per Share Amount | $ / shares						$ 0.80
Increase in additional paid-in capital upon conversion of convertible notes										31,000
Convertible Debt Securities [Member]
Debt Instrument [Line Items]
Warrants issued during period | shares						7,690
Convertible debt issued in units						$ 5,000
Interest Rate on Convertible Note						6.00%
Convertible notes [Member]
Debt Instrument [Line Items]
Transaction costs										29,000
Accretion expense										7,000		67,000
Financing and interest expense										20,000		24,000
Private Placement [Member] | Warrant [Member]
Debt Instrument [Line Items]
Warrants issued during period, value								$ 44,000
8% convertible notes due July 31, 2025 [Member]
Debt Instrument [Line Items]
Transactions costs of convertible notes										403,000			$ 403,000
Accretion expense										21,000		0
Beneficial conversion feature										0			411,000
Financing and interest expense										42,000		0
8% convertible notes due July 31, 2025 [Member] | Private Placement [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,100,000
Convertible notes percentage	8.00%
Convertible notes, conversion price | $ / shares	$ 0.40
Commission paid to agents	$ 199,525
Warrants issued during period | shares	613,000
Exercise price of warrants issued | $ / shares	$ 0.40
Warrants issued during period, value	$ 164,000
Transactions costs of convertible notes										268,000
8% convertible notes due Oct 15, 2024 [Member]
Debt Instrument [Line Items]
Transactions costs of convertible notes										268,000
Interest on convertible notes										33,000		35,000
8% convertible notes due Oct 15, 2024 [Member] | Private Placement [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 557,000	$ 1,200,000	$ 1,200,000			$ 557,000
Convertible notes percentage			8.00%	8.00%	8.00%			8.00%
Convertible notes, conversion price | $ / shares			$ 0.18	$ 0.18	$ 0.18			$ 0.18
Exercise price of warrants issued | $ / shares			$ 0.18	$ 0.18	$ 0.18			$ 0.18
Warrants issued during period, value					$ 482,000			$ 222,800
Accretion expense										14,000		$ 13,000
Payments of debt issuance costs			$ 39,000	$ 85,000
Amendment To Convertible Note [Member]
Debt Instrument [Line Items]
Convertible notes, conversion price | $ / shares		$ 0.44					$ 0.80
Transactions costs of convertible notes										$ 29,000			$ 29,000
Interest Rate on Convertible Note		8.00%					6.00%
Gain (Loss) on Extinguishment of Debt							$ 151,000,000