Significant Accounting Policies (Calculation of Diluted Income (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
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
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)
Net income (loss), 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
Net income (loss), 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 of common stock outstanding - diluted			7,545,487			5,786,904	5,906,025		5,928,818	5,884,263	5,411,204	5,886,730
Scenario, Previously Reported [Member]
Earnings Per Share, Basic			$ 1.58			$ 5.58	$ 3.69		$ 0.53	$ 6.19		$ 5.82
Earnings Per Share, Diluted			$ 1.17			$ 3.30	$ 2.09		$ 0.30	$ 3.53		$ 3.37
Net income (loss), basic			$ 8,941,000			$ 20,884,000	$ 13,555,000		$ 1,934,000	$ 22,818,000		$ 21,824,000
Weighted average number of shares of common stock outstanding - diluted			7,658,556			6,319,802	6,497,619		6,514,181	6,472,093		6,472,093
Restatement Adjustment [Member]
Earnings Per Share, Basic			$ (0.31)			$ (1.71)	$ (1.13)		$ (0.06)	$ (1.82)		$ (1.61)
Earnings Per Share, Diluted			$ (1.50)			$ (4.16)	$ (2.72)		$ (1.36)	$ (5.49)		$ (5.70)
Net income (loss), basic			$ (1,716,000)			$ (6,391,000)	$ (4,166,000)		$ (202,000)	$ (6,703,000)		$ (6,067,000)
Net income (loss), diluted			$ (9,707,000)			$ (19,459,000)	$ (13,131,000)		$ (8,009,000)	$ (27,624,000)		$ (29,474,000)
Weighted average number of shares of common stock outstanding - diluted			(113,069)			(532,898)	(591,594)		(585,363)	(587,830)		(585,363)
Series B Convertible Preferred Stock [Member]
Weighted average number of shares of common stock outstanding - diluted												1,748,288