Income Taxes - NOLs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net operating loss carry-forwards
Valuation allowance	$ 36,877,000	$ 36,692,000
Interest expense recognized for uncertain tax positions	0	0	$ 0
Penalties recognized for uncertain tax positions	0	$ 0	$ 0
U.S. federal
Net operating loss carry-forwards
Net operating loss carry-forwards	107,982,000
U.S. federal | Transpera, Inc.
Net operating loss carry-forwards
Net operating loss carry-forwards available to offset future taxable income annually under Section 382	161,000
State
Net operating loss carry-forwards
Net operating loss carry-forwards	74,992,000
Foreign | Germany
Net operating loss carry-forwards
Net operating loss carry-forwards	6,787,000
Foreign | United Kingdom
Net operating loss carry-forwards
Net operating loss carry-forwards	5,901,000
Foreign | Australia
Net operating loss carry-forwards
Net operating loss carry-forwards	$ 98,000