Restatements (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Balance Sheet data:
Deferred revenue, current	$ 22,314,498		$ 22,314,498		$ 12,507,471
Deferred revenue, long term	6,538,085		6,538,085		1,647,249
Total liabilities	40,303,950		40,303,950		19,524,817
Accumulated deficit	(85,038,319)		(85,038,319)		(95,571,576)
Total stockholders' equity	15,764,060		15,764,060		4,120,393
Statement of Operations data:
Contract revenue	16,297,972	4,800	32,802,137	6,800
Income (loss) from operations	7,147,609	(6,205,497)	15,712,319	(14,747,368)
Income (loss) before income taxes	3,782,641		10,533,257
Net income (loss)	3,782,641	(5,098,351)	10,533,257	(14,117,662)
Basic earnings per share:	$ 0.13	$ (0.18)	$ 0.36	$ (0.52)
Diluted earnings per share:	$ 0.12	$ (0.18)	$ 0.35	$ (0.52)
As Restated [Member]
Balance Sheet data:
Deferred revenue, current	7,234,697		7,234,697
Deferred revenue, long term	5,062,366		5,062,366
Total liabilities	12,297,063		12,297,063
Accumulated deficit	(12,297,063)		(12,297,063)
Total stockholders' equity	(12,297,063)		(12,297,063)
Statement of Operations data:
Contract revenue	1,248,372		(12,297,063)
Income (loss) from operations	1,248,372		(12,297,063)
Income (loss) before income taxes	1,248,372		(12,297,063)
Net income (loss)	3,782,641
As Reported [Member]
Balance Sheet data:
Deferred revenue, current	15,079,801		15,079,801
Deferred revenue, long term	1,475,719		1,475,719
Total liabilities	28,006,887		28,006,887
Accumulated deficit	(72,741,256)		(72,741,256)
Total stockholders' equity	28,061,123		28,061,123
Statement of Operations data:
Contract revenue	15,049,600		45,099,200
Income (loss) from operations	5,899,237		28,009,382
Income (loss) before income taxes	2,534,269		22,830,320
Net income (loss)	$ 2,534,269		$ 22,830,320
Basic earnings per share:	$ 0.09		$ 0.77
Diluted earnings per share:	$ 0.08		$ 0.76