Stockholders’ Equity (Deficit) (Details)					3 Months Ended
	Mar. 15, 2017 USD ($) $ / shares shares	Sep. 08, 2016 USD ($)	Aug. 10, 2016 USD ($)	Aug. 04, 2016 shares	Mar. 31, 2017 USD ($) Vote / shares $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 shares
Common Stock
Common stock shares issued | shares					10,596,838		9,270,255
Common stock shares outstanding | shares					10,596,838		9,270,255
Warrants
Purchase of additional common stock through warrants | shares					993,204
Term of warrants					5 years
Exercise price of warrant | $ / shares					$ 10.40
Fair market value of warrant | $					$ 4,900,000
Risk-free interest rate					2.00%
Contractual term					5 years
Dividend yield					0.00%
Volatility factor					65.10%
Offering Costs
Offering costs | $					$ 1,072,000	$ 86,000
Common Stock
Dividends Rights
No dividends declared | $					$ 0
Voting Rights
Common stock, vote per share | Vote / shares					1
Private placement
Common Stock
Issuance of stock (in shares) | shares	1,324,256
Price per issue and sold units | $ / shares	$ 9.47
Gross proceeds | $	$ 12,500,000				$ 8,979,000
Number of shares per unit | shares	1
Number of warrants per unit | shares	0.75
Issuance costs of offering | $	$ 1,200,000				1,219,000
Warrants
Term of warrants	5 years
Exercise price of warrant | $ / shares	$ 10.40
Offering Costs
Offering costs | $					$ 1,200,000
Private placement | Common Stock
Common Stock
Issuance of stock (in shares) | shares					1,324,256
Gross proceeds | $					$ 1,000
IPO
Common Stock
Issuance of stock (in shares) | shares				3,000,000
Offering Costs
Offering costs | $		$ 2,100,000	$ 4,100,000