Long-Term Debt (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) Letter	May 11, 2018 USD ($)	Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items]
Principal amount of the line of credit		$ 5.0
Citizen's Bank [Member]
Line of Credit Facility [Line Items]
Number of letters of credit | Letter	2
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 letter of credit balance	$ 0.0
Number of letters of credit | Letter	2
Letters of credit, amount outstanding	$ 0.7
Line of credit facility, remaining borrowing capacity	$ 4.3
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	2
Letters of credit, amount outstanding	$ 0.6
Restricted cash and cash equivalents	$ 0.6		$ 1.0