Stockholders' Equity and Non-controlling Interest - Narrative (Details) - USD ($)		3 Months Ended	12 Months Ended
	Mar. 04, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 03, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from issuance of common stock	$ 20,000,000		$ 0	$ 18,360,000
Additional shares issuable under Share Exchange Agreement (in shares)			33,737,551	33,712,551
Stockholders’ equity attributable to non-controlling interest			$ (6,024,000)	$ (2,060,000)
Non-controlling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders’ equity attributable to non-controlling interest				(2,100,000)
Rochon Capital Partners, Ltd.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock, shares outstanding, percentage of ownership			40.00%
Additional shares issuable under Share Exchange Agreement (in shares)		25,240,676
Period for conditional transfer of right		10 years
Ownership interest acquired in all the stocks (as a percent)		15.00%
Underwritten Public Offering
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from issuance of common stock	$ 20,000,000
Warrants to purchase common stocks (in shares)	6,667,000
Sale of stock, price per share (in dollars per share)	$ 3.00
Exercise price of warrant per share (in dollars per share)	$ 3.75
Expiration period of warrants	5 years
Net proceeds from issuance of common stock	$ 17,800,000
Proceeds from warrant exercises			$ 25,000,000
Fair value of warrants	$ 9,000,000
Warrants, maximum beneficial ownership percentage without written notice	4.99%
Warrants, beneficial ownership percentage, period of notice to change ownership percentage	61 days
Warrants, maximum beneficial ownership percentage with written notice	9.99%
Over-Allotment Option
Accumulated Other Comprehensive Income (Loss) [Line Items]
Warrants to purchase common stocks (in shares)	1,000,050
Option period of warrants	45 days
Number of warrants exercised (in shares)	113,200
Number of warrants issued to underwriters (in shares)	166,675
At-the-Market Issuance Sales Agreement | MLV & Co. LLC
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from issuance of common stock				$ 684,000
Maximum aggregate offering price of common stock issuable under Sales Agreement					$ 25,000,000
Stock issued during period (in shares)			0	101,083