Liquidity and Going Concern - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017	Oct. 17, 2016	Mar. 01, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cash		$ 1,140,000	$ 1,764,000				$ 1,938,000
Working capital deficit		8,589,000
Restricted cash		18,000	242,000
Net loss		3,533,000	2,143,000
Net cash provided by operating activities		183,000	1,237,000
Interest payments on indebtedness		$ 1,116,000	1,199,000
Main Street Capital Corporation
Finite-Lived Intangible Assets [Line Items]
Common shares owned by stockholder (in shares)		7,711,517
Common shares owned, stockholder, percentage		21.00%
Comerica Term Loan
Finite-Lived Intangible Assets [Line Items]
Quarterly principal payments, excess cash flow, percent		50.00%
SRS Note | Promissory Note
Finite-Lived Intangible Assets [Line Items]
Stated interest rate percentage						15.00%
Note payable, face value		$ 1,785,000
Debt instrument, covenant, cash balance repayment threshold (greater than)		200.00%
Interest payable		$ 565,000
SRS Note | Promissory Note | Scenario, Forecast
Finite-Lived Intangible Assets [Line Items]
Interest payable				$ 752,000
Term Loan
Finite-Lived Intangible Assets [Line Items]
Stated interest rate percentage		12.00%
Main Street Capital Corporation | Term Loan
Finite-Lived Intangible Assets [Line Items]
Revolving loan facility, maximum borrowing capacity		$ 11,000,000
Term loan, outstanding borrowings		9,000,000
Line of credit facility, periodic payment, principal		0	$ 0
Main Street Capital Corporation | Main Street Revolver
Finite-Lived Intangible Assets [Line Items]
Revolving loan facility, maximum borrowing capacity		2,000,000			$ 2,000,000
Revolving loan facility, maximum borrowing capacity, not available during default		2,000,000
Line of credit facility, periodic payment, principal		$ 400,000
Debt instrument, principal payment, excess cash flow	$ 244,000