Schedule II - Valuation And Qualifying Accounts (Details) - USD ($)	12 Months Ended
	Jan. 27, 2019	Jan. 28, 2018	Jan. 29, 2017
Change in Valuation Allowances and Reserves [Roll Forward]
Accrued liabilities	$ 65,023,000	$ 60,832,000
Allowance for doubtful accounts and other sales allowances
Change in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	1,705,907	8,229,975	$ 7,792,799
Charged (Reversal) to Costs and Expenses	9,854,148	11,365,813	951,612
Deductions	(10,785,661)	(10,506,484)	(514,436)
Balance at End of Year	774,394	1,705,907	$ 8,229,975
Previously Reported | Allowance for doubtful accounts and other sales allowances
Change in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	9,089,304
Balance at End of Year		$ 9,089,304
Restatement Adjustment | ASU 2014-09
Change in Valuation Allowances and Reserves [Roll Forward]
Accrued liabilities	7,400,000
Restatement Adjustment | ASU 2014-09 | Allowance for doubtful accounts and other sales allowances
Change in Valuation Allowances and Reserves [Roll Forward]
Balance at End of Year	$ (7,400,000)