CONSOLIDATED STATEMENT OF CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' EQUITY (DEFICIT) - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Series A Convertible Preferred Shares	Common Shares	Additional Paid-in Capital	Accumulated Deficit	Total
Balance, beginning of period at Dec. 31, 2016	$ 43,270				$ 43,270
Balance, beginning of period (in shares) at Dec. 31, 2016	4,948,369
Increase (decrease) in temporary equity
Issuance of Series A preferred shares, net offering costs of $1364	$ 38,636
Issuance of Series A preferred shares, net offering costs of $1364 (in shares)	4,305,182
Issuance of Series A preferred shares as payment of offering costs	105,009
Beneficial conversion feature on Series A preferred shares	$ (12,006)
Accretion of beneficial conversion feature on Series A preferred shares	4,000
Balance, end of period at Mar. 31, 2017	$ 73,900				73,900
Balance, end of period (in shares) at Mar. 31, 2017	9,358,560
Balances at Dec. 31, 2016		$ 19,944	$ 10,479	$ (75,456)	(45,033)
Balances (in shares) at Dec. 31, 2016		13,088,500
Increase (Decrease) in Stockholders' Equity
Issuance of common shares as payment for equity investment (Note 5)		$ 352			352
Issuance of common shares as payment for equity investment (Note 5) (in shares)		32,500
Beneficial conversion feature on Series A preferred shares			12,006		12,006
Accretion of beneficial conversion feature on series A preferred shares	$ 4,000		(4,000)		(4,000)
Share-based compensation expense			1,886		1,886
Net Loss				(18,753)	(18,753)
Balances at Mar. 31, 2017		$ 20,296	$ 20,371	$ (94,209)	$ (53,542)
Balances (in shares) at Mar. 31, 2017		13,121,000