Long-Term Debt (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) Letter	Dec. 31, 2016 USD ($)
Citizen's Bank [Member]
Line of Credit Facility [Line Items]
Number of letters of credit | Letter	2
Letters of credit, amount outstanding	$ 0.4
Citizen's Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility term	3 years
Principal amount of the line of credit	$ 5.0
Percentage of letter of credit fees per annum	1.25%
Percentage of borrowing base equal to eligible accounts receivable	80.00%
Outstanding borrowings	$ 0.0
Number of letters of credit | Letter	6
Letters of credit, amount outstanding	$ 1.7
Line of credit facility, remaining borrowing capacity	$ 3.3
Citizen's Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.25%
BB&T Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Number of letters of credit | Letter	3
Letters of credit, amount outstanding	$ 0.9
Restricted cash and cash equivalents	$ 1.0	$ 1.1