Nature of Business and Summary of Significant Accounting Policies Cumulative Effect of Accounting Standards Adoption (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	$ 2,174,000
Restructuring Reserve	0		$ 218,000	$ 194,000	$ 0
Total property, plant & equipment, net	596,000	$ 669,000	545,000
Right of use assets – operating leases	1,746,000	1,367,000	0
Accounts payable and other accrued liabilities	2,816,000	2,627,000	2,838,000
Operating lease, liability, current	587,000	759,000	0
Deferred rent	0	0	45,000
Operating lease, liability, noncurrent	1,587,000	1,100,000	0
Deferred rent, non-current	0	0	302,000
Accumulated deficit	$ (65,128,000)	(58,685,000)	$ (58,875,000)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability		1,900,000
Adoption of ASC Topic 842		190,000
Right of use assets – operating leases		1,400,000
Operating lease, liability, current		759,000
Operating lease, liability, noncurrent		1,100,000
Scenario, Adjustment | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total property, plant & equipment, net		124,000
Right of use assets – operating leases		1,367,000
Accounts payable and other accrued liabilities		(211,000)
Operating lease, liability, current		759,000
Deferred rent		(45,000)
Operating lease, liability, noncurrent		1,100,000
Deferred rent, non-current		(302,000)
Accumulated deficit		$ 190,000