Credit Agreements (Details) - USD ($)			3 Months Ended		9 Months Ended
	Oct. 09, 2015	Feb. 01, 2014	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2016	Oct. 08, 2015	Mar. 06, 2015	Jan. 31, 2015	Jan. 31, 2014	Feb. 09, 2012
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months			$ 536,000		$ 536,000
Document Period End Date					Oct. 31, 2015
Long-term Line of Credit, Noncurrent			66,173,000		$ 66,173,000					$ 50,971,000
Long-term Debt, Maturities, Repayments of Principal in Year Two			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Four			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Five			2,143,000		2,143,000
Thereafter			59,208,000		59,208,000
Long term, Total Credit Facility			68,316,000		68,316,000					52,707,000
Line of Credit, Current			(2,143,000)		(2,143,000)					(1,736,000)
2015 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 90,000,000
Line of Credit, Accordion Feature								25,000,000	$ 15,000,000
2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, End		5 years
Line of Credit Facility, Capacity Available for Trade Purchases											$ 6,000,000
Line of Credit Facility, Remaining Borrowing Capacity			23,600,000		23,600,000
Earmarked for Distribution Facility Expansion			2,600,000		2,600,000
Interest Expense, Debt			684,000	$ 398,000	1,945,000	$ 1,172,000
Debt Instrument, Covenant Compliance, Minimum Unrestricted Cash Requirement											10,000,000
Debt Instrument, Covenant Compliance, Minimum Unrestricted Cash Threshold for Additional Covenants			16,000,000		16,000,000
Deferred Finance Costs, Noncurrent, Net											$ 1,101,000	$ 466,000
2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Long-term Line of Credit			55,000,000		55,000,000					40,700,000
Line of Credit Facility, Maximum Borrowing Capacity								$ 15,000,000
Debt Instrument, Term		84 months
Mandatory Prepayment Percentage		50.00%
Mandatory Prepayment Maximum Amount		$ 2,000,000
Long-term Debt			13,316,000		13,316,000					12,007,000
Long term, Total Credit Facility			68,316,000		68,316,000					52,707,000
Line of Credit, Current			(2,143,000)		(2,143,000)					(1,736,000)
Long-term Debt, Excluding Current Maturities			66,173,000		66,173,000					$ 50,971,000
Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months			536,000		536,000
Long-term Debt, Maturities, Repayments of Principal in Year Two			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Four			2,143,000		2,143,000
Long-term Debt, Maturities, Repayments of Principal in Year Five			2,143,000		2,143,000
Thereafter			4,208,000		4,208,000
Long term, Total Credit Facility			13,316,000		13,316,000
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months			0		0
Long-term Debt, Maturities, Repayments of Principal in Year Two			0		0
Long-term Debt, Maturities, Repayments of Principal in Year Three			0		0
Long-term Debt, Maturities, Repayments of Principal in Year Four			0		0
Long-term Debt, Maturities, Repayments of Principal in Year Five			0		0
Thereafter			55,000,000		55,000,000
Long term, Total Credit Facility			$ 55,000,000		$ 55,000,000
LIBOR [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		3.00%
LIBOR [Member] | 2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		6.00%
LIBOR Rate Period One		1 month
LIBOR Rate Period Two		2 months
LIBOR Rate Period Three		3 months
LIBOR Rate Period Four		6 months
Debt Instrument Minimum Basis Spread		5.00%
Debt Instrument Maximum Basis Spread		6.00%
Base Rate Option [Member] | 2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		5.00%
Debt Instrument Minimum Basis Spread		4.00%
Debt Instrument Maximum Basis Spread		5.00%
Year One [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Early Termination Fee	3.00%
Year Two [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Early Termination Fee	1.00%
Year Three [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Early Termination Fee	0.50%
Scenario, Forecast [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance, Minimum Unrestricted Cash Threshold for Additional Covenants							$ 18,000,000