Property, Equipment and Right-of-Use Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Right-of-use assets	$ 2,799,000		$ 2,799,000		$ 2,890,000
Property and equipment, gross	15,789,000		15,789,000		15,744,000
Less accumulated depreciation	(10,224,000)		(10,224,000)		(9,132,000)
Property, equipment and right-of-use assets	5,565,000		5,565,000		6,612,000
Depreciation	453,000	$ 472,000	911,000	$ 975,000
Impairment charges	0	$ 0	0	$ 0
Disposals	$ 79,000		$ 268,000
Minimum
Property, Plant and Equipment [Line Items]
Depreciable Lives, Right of use assets	1 year		1 year
Maximum
Property, Plant and Equipment [Line Items]
Depreciable Lives, Right of use assets	5 years		5 years
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7,510,000		$ 7,510,000		7,491,000
Depreciable Lives			5 years
Furniture, fixtures and tooling
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,152,000		$ 2,152,000		2,233,000
Furniture, fixtures and tooling | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Lives			4 years
Furniture, fixtures and tooling | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Lives			8 years
Computer hardware
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,236,000		$ 1,236,000		1,261,000
Computer hardware | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Lives			3 years
Computer hardware | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Lives			5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,743,000		$ 1,743,000		1,671,000
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Lives			3 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Lives			5 years
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 349,000		$ 349,000		$ 198,000