Commitments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Commitments
Rental expense	$ 100,000	$ 100,000	$ 300,000	$ 200,000
Future minimum payments for operating leases
Remainder of 2014	79,000		79,000
2015	65,000		65,000
2016	10,000		10,000
Total	154,000		154,000
Future minimum payments for other commitments
Remainder of 2014	3,406,000		3,406,000
2015	3,917,000		3,917,000
2016	2,234,000		2,234,000
2017	311,000		311,000
2018 and thereafter	6,000		6,000
Total	9,874,000		9,874,000
Future minimum payments for operating leases and other commitments
Remainder of 2014	3,485,000		3,485,000
2015	3,982,000		3,982,000
2016	2,244,000		2,244,000
2017	311,000		311,000
2018 and thereafter	6,000		6,000
Total	$ 10,028,000		$ 10,028,000