Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Deficit	Accumulated other comprehensive income	Total shareholders' equity	Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of change in accounting policy | Accounting Standards Update 2018-02	$ 2,474		$ 2,474		$ 2,474
Beginning Balance (in shares) at Dec. 31, 2017		74,366,824
Beginning Balance at Dec. 31, 2017	127,268	$ 430,383	(309,287)	$ 2,289	123,385	$ 3,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(25,362)		(25,245)		(25,245)	(117)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,554			1,554	1,554
Shares Issued For Cash By At The Market Offering Shares		14,283,254
Shares Issued For Cash By At The Market Offering	32,192	$ 32,192			32,192
Stock Issuance Costs	(922)	(922)			(922)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,762	$ 2,762			2,762
Effect of shares issued for conversion of Convertible Debentures	323	2,409
Shares issued for exercise of share purchase warrants	$ 8	$ 8			8
Shares Issued for Consulting Services		247,485
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	569	$ 569			569
Share issued for property acquisitions (in shares)		1,102,840
Share issued for property acquisitions	$ 3,739	$ 3,739			3,739
Shares issued for the vesting of restricted stock units (in shares)	829,610	899,192
Shares issued for public offering (in shares)		355,092
Shares issued for consulting services	122,854
Adjustments to Additional Paid in Capital, Warrant Issued	$ 722	$ 722			722
Stock Issued During Period, Value, Stock Options Exercised	764	764			764
Stock Issued During Period, Value, Cash Payment for Tax Withholding	$ (914)	$ (914)			(914)
Stock Issued For Exercise Of Warrants	44,185	187,970
Ending Balance (in shares) at Dec. 31, 2018		91,445,066
Ending Balance at Dec. 31, 2018	$ 144,854	$ 469,303	(332,058)	3,843	141,088	3,766
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(38,094)		(37,978)		(37,978)	(116)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(854)			(854)	(854)
Shares Issued For Cash By At The Market Offering Shares		8,043,365
Shares Issued For Cash By At The Market Offering	20,141	$ 20,141			20,141
Stock Issuance Costs	(463)	(463)			(463)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 3,771	$ 3,771			3,771
Effect of shares issued for conversion of Convertible Debentures	0	266,272
Shares issued for exercise of share purchase warrants	$ 847	$ 847			847
Shares Issued for Consulting Services		74,781
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	$ 208	$ 208			208
Shares issued for the vesting of restricted stock units (in shares)	786,746	850,150
Contributions attributable to non-controlling interest	$ 46					46
Shares issued for public offering (in shares)		54,805
Shares issued for consulting services	46,067
Adjustments to Additional Paid in Capital, Warrant Issued	$ 5	$ 5			5
Stock Issued During Period, Value, Stock Options Exercised	$ 146	$ 146			146
Stock Issued For Exercise Of Warrants	1,057	1,450
Ending Balance (in shares) at Dec. 31, 2019		100,735,889
Ending Balance at Dec. 31, 2019	$ 130,607	$ 493,958	(370,036)	2,989	126,911	3,696
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(27,872)		(27,776)		(27,776)	(96)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(681)			(681)	(681)
Shares Issued For Cash By Public Offering Shares		11,300,000
Shares Issued For Cash By Public Offering Amount	16,611	$ 16,611			16,611
Shares Issued For Cash By At The Market Offering Shares		21,361,784
Shares Issued For Cash By At The Market Offering	38,109	$ 38,109			38,109
Stock Issuance Costs	(2,330)	(2,330)			(2,330)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,598	$ 2,598			2,598
Effect of shares issued for conversion of Convertible Debentures	0
Shares Issued for Consulting Services		120,000
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	$ 188	$ 188			188
Shares issued for the vesting of restricted stock units (in shares)	452,932	490,453
Contributions attributable to non-controlling interest	$ 133					133
Shares issued for public offering (in shares)		302,707
Shares issued for consulting services	74,672
Adjustments to Additional Paid in Capital, Warrant Issued	$ 1	$ 1			1
Stock Issued During Period, Value, Stock Options Exercised	597	597			597
Stock Issued During Period, Value, Cash Payment for Tax Withholding	$ (415)	$ (415)			(415)
Stock Issued For Exercise Of Warrants	0	200
Ending Balance (in shares) at Dec. 31, 2020		134,311,033
Ending Balance at Dec. 31, 2020	$ 157,546	$ 549,317	$ (397,812)	$ 2,308	$ 153,813	$ 3,733