Debt - Narrative (Details) - USD ($)			1 Months Ended			3 Months Ended		12 Months Ended
	Apr. 15, 2015	Nov. 21, 2014	Jun. 30, 2017	Dec. 31, 2016	May 31, 2016	Jul. 31, 2017	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Debt Instrument [Line Items]
Payment of principal								$ 1,111,689	$ 2,796,590
Deferred finance costs							$ 199,000	128,000	$ 199,000
Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee in connection with the term loan								18,000
Credit Agreement
Debt Instrument [Line Items]
Repayment of credit facility		$ 7,400,000
Amortization of financing costs		355,000
Credit Agreement | Senior term loan
Debt Instrument [Line Items]
Revolving line of credit		10,000,000
Deferred finance costs								128,000
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving line of credit		$ 5,000,000						5,000,000
Borrowings outstanding								0
Credit Agreement | Senior Notes
Debt Instrument [Line Items]
Repayment of credit facility			$ 500,000	$ 500,000		$ 500,000	$ 500,000
Payment of principal					$ 1,738,000
Minimum | LIBOR | Credit Agreement
Debt Instrument [Line Items]
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus	4.25%	4.25%
Minimum | Base Rate | Credit Agreement
Debt Instrument [Line Items]
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus	3.25%	3.25%
Maximum | LIBOR | Credit Agreement
Debt Instrument [Line Items]
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus	6.25%	5.25%
Maximum | Base Rate | Credit Agreement
Debt Instrument [Line Items]
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus	5.25%	4.25%
January 31, 2018 | Credit Agreement
Debt Instrument [Line Items]
Minimum liquidity								5,000,000
February 1, 2018 through January 31, 2019 | Credit Agreement
Debt Instrument [Line Items]
Minimum liquidity								4,000,000
February 1, 2019 | Credit Agreement
Debt Instrument [Line Items]
Minimum liquidity								$ 3,000,000