Consolidated Statement of Stockholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
Balance at the beginning of the period at Dec. 31, 2014	$ 1	$ 5,201	$ (4,088)		$ 1,114
Balance at the beginning of the period (in shares) at Dec. 31, 2014	6,191
Increase (decrease) in equity
Pre-merger equity issuance	$ 9	86,991			87,000
Pre-merger equity issuance (in shares)	89,489
Equity issuance costs		(2,746)			(2,746)
Dividend		(1,040)			(1,040)
Net loss			(7,764)		(7,764)
Balance at the end of the period at Dec. 31, 2015	$ 10	88,406	(11,852)		76,564
Balance at the end of the period (in shares) at Dec. 31, 2015	95,680
Increase (decrease) in equity
Other comprehensive loss				$ (27)	(27)
Net loss			(8,439)		(8,439)
Balance at the end of the period at Dec. 31, 2016	$ 10	88,406	(20,291)	(27)	$ 68,098
Balance at the end of the period (in shares) at Dec. 31, 2016	95,680				95,700
Increase (decrease) in equity
Pre-merger equity issuance		20,100			$ 20,100
Pre-merger equity issuance (in shares)	2,810
Reverse recapitalization	$ 1	26,773			26,774
Reverse recapitalization (in shares)	6,759
Issuance of common stock		10,000			10,000
Issuance of common stock (in shares)	1,026
Equity issuance costs		(6,295)			(6,295)
Share-based compensation		19,754			19,754
Other comprehensive loss				(13)	(13)
Net loss			(35,326)		(35,326)
Balance at the end of the period at Dec. 31, 2017	$ 11	$ 158,738	$ (55,617)	$ (40)	$ 103,092
Balance at the end of the period (in shares) at Dec. 31, 2017	106,275				106,300