Common Stock, Common Stock Warrants and Stock Option Plan - Common Stock (Details)	12 Months Ended
	Dec. 31, 2017 Vote $ / shares shares	Dec. 31, 2016 Vote $ / shares shares
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, shares authorized (in shares) | shares	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Voting right common stock holder	Each holder of common stock is entitled to one vote per share.	Each holder of common stock is entitled to one vote per share.
Common stock, votes per share (in votes) | Vote	1	1
Common stock, dividends declared	$ 0	$ 0