Common Shares (Tables)

12 Months Ended

Dec. 31, 2018

Common Shares

Summary of outstanding warrants

		Weighted		Weighted
		average		average
	Warrants	exercise price		remaining life
	outstanding	per share		(yrs.)	Intrinsic value
As of December 31, 2016	6,514,625	$	1.92	2.6	$	—
As of December 31, 2017	6,514,625	$	1.92	1.6	$	—
As of December 31, 2018	6,514,625	$	1.92	0.6	$	—

Summary of stock-based compensation expense

		Year Ended December 31,
	2018		2017
Stock options	$	320	$	36
Restricted stock units		662		838
	$	982	$	874
Phantom units		23		—

Summary of option activity

		Weighted average		Weighted average	Aggregate
	Number of	exercise price		remaining	intrinsic
	options	per option		contractual term	value
Outstanding - December 31, 2016	1,544,500		1.05	1.79	$	626
Expired	(400,000)		2.87			—
Outstanding - December 31, 2017	1,144,500	$	0.42	1.15	$	346
Granted	1,142,000		0.71
Exercised	(218,600)		0.39			36
Cancelled/Forfeited	(748,751)		0.36
Outstanding - December 31, 2018	1,319,149	$	0.71	3.84	$	1
Exercisable - December 31, 2018	559,480	$	0.70	3.23	$	1

Summary of the status of unvested stock options

				Weighted
		Weighted		average
		average		remaining
		grant-date		amortization
	Number of	fair value		period
	options	per option		(Years)
Unvested - December 31, 2016	296,250		0.49	1.23
Vested	(50,000)		0.69
Unvested - December 31, 2017	246,250	$	0.22	0.99
Granted	1,142,000		0.45
Cancelled/Forfeited	(246,250)		0.22
Vested	(382,331)		0.45
Unvested - December 31, 2018	759,669	$	0.45	1.14

Summary of stock option assumptions

	2018
Expected volatility	76.2	%
Risk-free interest rate	2.7	%
Expected life (years)	5
Dividend yield	0	%
Forfeiture assumption	—	%

Summary of restricted stock unit activity

		Weighted average
	Number	grant-date fair
	of RSUs	value per RSU
Unvested - December 31, 2016	2,668,387	$	0.49
Cancelled/forfeited	(441,084)		0.34
Vested, net of shares withheld	(1,625,399)		0.38
Granted	966,003		0.82
Unvested - December 31, 2017	1,567,907	$	0.85
Cancelled/forfeited	(246,683)		0.90
Vested, net of shares withheld	(637,554)		0.88
Granted	319,000		0.75
Unvested - December 31, 2018	1,002,670	$	0.78

Summary of phantom units

		Weighted average
	Number of	remaining
	phantom units	contractual term
Unvested - December 31, 2017	—
Granted	265,000
Unvested - December 31, 2018	265,000	1.50

Schedule of weighted average common shares

	At December 31,
	2018	2017
Basic common shares	99,738,461	98,627,255
Effect of dilutive stock-based awards	—	—
Diluted common shares	99,738,461	98,627,255