Income Taxes (Details 4) $ in Thousands	Dec. 31, 2018 USD ($)
Federal [Member]
Net operating loss carry-forwards	$ 87,600
Federal [Member] | Expiration 2025 [Member]
Net operating loss carry-forwards	4,200
Federal [Member] | Expiration 2026 [Member]
Net operating loss carry-forwards	25,400
Federal [Member] | Expiration 2027 [Member]
Net operating loss carry-forwards	15,500
Federal [Member] | Expiration 2028 [Member]
Net operating loss carry-forwards	5,200
Federal [Member] | Expiration 2029 [Member]
Net operating loss carry-forwards	7,700
Federal [Member] | Expiration 2030 [Member]
Net operating loss carry-forwards	10,600
Federal [Member] | Expiration 2032 [Member]
Net operating loss carry-forwards	1,300
Federal [Member] | Expiration 2033 [Member]
Net operating loss carry-forwards	100
Federal [Member] | Expiration 2034 [Member]
Net operating loss carry-forwards	2,500
Federal [Member] | Expiration 2035 [Member]
Net operating loss carry-forwards	1,500
Federal [Member] | Do not expire [Member]
Net operating loss carry-forwards	13,600
State [Member]
Net operating loss carry-forwards	35,900
State [Member] | Expiration 2034 [Member]
Net operating loss carry-forwards	1,400
State [Member] | Expiration 2035 [Member]
Net operating loss carry-forwards	800
State [Member] | Expiration 2028 [Member]
Net operating loss carry-forwards	2,700
State [Member] | Expiration 2029 [Member]
Net operating loss carry-forwards	5,800
State [Member] | Expiration 2030 [Member]
Net operating loss carry-forwards	11,000
State [Member] | Expiration 2038 [Member]
Net operating loss carry-forwards	2,400
California [Member]
Net operating loss carry-forwards	24,100
Other State [Member]
Net operating loss carry-forwards	$ 11,800