Organization and Business Operations (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended								7 Months Ended	12 Months Ended
	Jun. 21, 2016	May 23, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Subsidiary, Sale of Stock [Line Items]
Incorporation state												Nevada
Incorporation date												May 19, 2014
Proceeds from issuance of common stock from initial public offering, net of issuance costs	$ 20,300											$ 20,915
Net loss			$ (2,809)	$ (2,767)	$ (2,258)	$ (1,684)	$ (1,017)	$ (751)	$ (599)	$ (444)	$ (277)	$ (9,518)	$ (2,811)
Common Stock [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock upon initial public offering, net of issuance costs, shares		5,000,000									1,125,000	5,750,000
Underwriters exercised overallotment option to purchase additional shares	749,846
Price per share	$ 4.00	$ 4.00
Net loss