Stockholders' Equity (Common Stock Warrants) (Details) - USD ($)	1 Months Ended			12 Months Ended
	Mar. 23, 2016	Feb. 28, 2014	Jul. 23, 2013	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2011	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares issued				4,200,310	2,620,439
Fair value of common stock				$ 840	$ 524
Common Stock Warrants
Weighted average price					$ 19.57		$ 39.32
Common Stock Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant outstanding				296,159
Common stock shares issued	910,000
Number of shares of common stock issuable through warrants	682,500	1,523	12,500	386,341
Exercise price of warrant liabilities	$ 0.75
Expiration term	5 years		5 years			10 years
Exercise price	$ 10.00		$ 125.00	$ 10.00		$ 4.80
Fair value of common stock	$ 2,522,754
Common Stock Warrants
Outstanding, beginning balance				310,397	14,238
Granted					682,500	3,261
Exercised					(386,341)
Expired
Outstanding, ending balance				310,397	310,397
Weighted average price				$ 14.60
Number of shares issued from cashless exercise of warrant		1,432
Number of shares outstanding from cashless exercise of warrant		1,738