Net Income (Loss) Per Share (Computation of Diluted Net Loss Per Share Error Correction) (Details) - USD ($)	3 Months Ended								6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ (2,231,000)	$ 5,439,000	$ 10,769,000	$ (14,493,000)	$ (664,000)	$ 21,207,000	$ 13,873,000	$ (11,307,000)			$ (516,000)	$ 23,109,000
Net Income (Loss) Available to Common Stockholders, Basic	$ (3,180,000)	$ (1,724,000)	$ 7,225,000	$ (14,831,000)	$ (994,000)	$ 14,493,000	$ 9,389,000	$ (11,621,000)	$ 1,732,000	$ 16,115,000	$ (10,794,000)	$ 15,757,000
Weighted Average Number of Shares Outstanding, Basic											5,411,204	3,746,639
Earnings Per Share, Basic	$ (0.54)	$ (0.30)	$ 1.27	$ (3.49)	$ (0.25)	$ 3.87	$ 2.56	$ (3.18)	$ 0.47	$ 4.37	$ (1.99)	$ 4.21
Change in fair value of warrant liability related to dilutive warrants												$ (9,066,000)
Dilutive shares												6,067,000
Change in fair value of Series B preferred stock derivative liability											$ (9,330,000)	$ (27,764,000)
Accretion of Series B redeemable convertible preferred stock	$ 949,000	$ 7,163,000	$ 1,828,000	$ 338,000	$ 330,000	$ 323,000	$ 318,000	$ 314,000			10,278,000	1,285,000
Net Income (Loss) Available to Common Stockholders, Diluted			$ (2,482,000)			$ (4,966,000)	$ (3,742,000)		$ (6,277,000)	$ (11,509,000)	$ (10,794,000)	$ (13,717,000)
Weighted Average Number of Shares Outstanding, Diluted			7,545,487			5,786,904	5,906,025		5,928,818	5,884,263	5,411,204	5,886,730
Earnings Per Share, Diluted	$ (0.54)	$ (0.30)	$ (0.33)	$ (3.49)	$ (0.44)	$ (0.86)	$ (0.63)	$ (3.18)	$ (1.06)	$ (1.96)	$ (1.99)	$ (2.33)
Warrant [Member]
Weighted Average Number of Shares Outstanding, Diluted												391,803
Series B Convertible Preferred Stock [Member]
Change in fair value of Series B preferred stock derivative liability											$ (9,330,000)	$ (27,760,000)
Accretion of Series B redeemable convertible preferred stock											$ (10,278,000)	$ 1,285,000
Weighted Average Number of Shares Outstanding, Diluted												1,748,288
Scenario, Previously Reported [Member]
Net Income (Loss) Available to Common Stockholders, Basic			$ 8,941,000			$ 20,884,000	$ 13,555,000		$ 1,934,000	$ 22,818,000		$ 21,824,000
Weighted Average Number of Shares Outstanding, Basic												3,746,639
Earnings Per Share, Basic			$ 1.58			$ 5.58	$ 3.69		$ 0.53	$ 6.19		$ 5.82
Weighted Average Number of Shares Outstanding, Diluted			7,658,556			6,319,802	6,497,619		6,514,181	6,472,093		6,472,093
Earnings Per Share, Diluted			$ 1.17			$ 3.30	$ 2.09		$ 0.30	$ 3.53		$ 3.37
Restatement Adjustment [Member]
Net Income (Loss) Available to Common Stockholders, Basic			$ (1,716,000)			$ (6,391,000)	$ (4,166,000)		$ (202,000)	$ (6,703,000)		$ (6,067,000)
Earnings Per Share, Basic			$ (0.31)			$ (1.71)	$ (1.13)		$ (0.06)	$ (1.82)		$ (1.61)
Adjustment related to preferred stockholders' participation in the Company's undistributed earnings												(6,067,000)
Net Income (Loss) Available to Common Stockholders, Diluted			$ (9,707,000)			$ (19,459,000)	$ (13,131,000)		$ (8,009,000)	$ (27,624,000)		$ (29,474,000)
Weighted Average Number of Shares Outstanding, Diluted			(113,069)			(532,898)	(591,594)		(585,363)	(587,830)		(585,363)
Earnings Per Share, Diluted			$ (1.50)			$ (4.16)	$ (2.72)		$ (1.36)	$ (5.49)		$ (5.70)
Restatement Adjustment [Member] | Series B Convertible Preferred Stock [Member]
Accretion of Series B redeemable convertible preferred stock												$ (1,285,000)