Long-Term Debt (Details)			6 Months Ended
	Jun. 30, 2016 USD ($)	Apr. 29, 2016 USD ($) ft²	Jun. 30, 2016 USD ($)	Apr. 01, 2016 USD ($)
Remaining principal payments
2016	$ 69,000		$ 69,000
2017	140,000		140,000
2018	143,000		143,000
2019	146,000		146,000
2020	149,000		149,000
Thereafter	2,757,000		2,757,000
Total Principal	3,404,000		3,404,000
Less: Current Portion	137,000		137,000
Long-term portion	3,267,000		3,267,000
Loan
Financing agreement
Monthly payments including interest		$ 18,000
Interest rate		2.14%
Deferred debt issuance costs, gross		$ 139,000
Loan’s effective interest rate		2.77%
Debt service coverage ratio		1.25
Debt Issuance Costs
Amortization of debt costs			2,000
Deferred debt issuance costs, noncurrent, net	124,000		124,000
Deferred debt issuance costs, current, net	13,000		13,000
Amortization of debt costs expected in current year	9,000		9,000
Annual expected amortization expense over the next four years	$ 12,000		12,000
Remaining amortization period	4 years
Loan | Building
Financing agreement
Area of building | ft²		27,300
Line Of Credit.
Debt Issuance Costs
Maximum borrowings	$ 2,050,000		$ 2,050,000
Line Of Credit. | 30-day LIBOR
Debt Issuance Costs
Line of credit basis spread (as a percent)			1.80%
Duluth Economic Development Authority
Financing agreement
Bonds issued to the Bank				$ 3,415,000
Purchase price of the bond (as a percent)		100.00%