For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 16, 2019	Jan. 31, 2019	Jan. 31, 2018	Feb. 01, 2019
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 10,156	$ 7,084
Drafts Payable		200	100
Restricted Cash and Cash Equivalents, Total		2,581	1,237
Receivables, Long-term Contracts or Programs, Total		4,300	3,200
Depreciation, Total		4,500	4,900
Goodwill, Impairment Loss		0	0
Finite-Lived Patents, Gross		2,600	2,600
Finite-Lived Intangible Assets, Accumulated Amortization		2,500	2,400
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		100
Finite-Lived Intangible Assets, Amortization Expense, Year Two		100
Finite-Lived Intangible Assets, Amortization Expense, Year Three		100
Finite-Lived Intangible Assets, Amortization Expense, Year Four		100
Finite-Lived Intangible Assets, Amortization Expense, Year Five		100
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		$ 100
Finite-Lived Intangible Asset, Useful Life		7 years 109 days
Research and Development Expense, Total		$ 200	300
Number of Reportable Segments		1
Accounting Standards Update 2016-02 [Member] \| Scenario, Forecast [Member] \| Minimum [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 10,000
Accounting Standards Update 2016-02 [Member] \| Scenario, Forecast [Member] \| Maximum [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 11,000
Accounts Receivable [Member]
Accounts Receivable, Gross		$ 4,700	$ 5,400
Receivables, Long-term Contracts or Programs, Total		3,700
Proceeds from Sale and Collection of Receivables, Total		700
Allowance for Doubtful Accounts Receivable, Ending Balance		$ 0
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage		42.00%	34.90%
Accounts Receivable [Member] \| Subsequent Event [Member]
Accounts Receivable, Gross	$ 4,400
Proceeds from Sale and Collection of Receivables, Total	$ 300
Accounts Receivable [Member] \| Other Noncurrent Assets [Member]
Receivables, Long-term Contracts or Programs, Total		$ 3,500	$ 3,200
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage		0.00%	0.00%
Geographic Distribution, Domestic [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 100	$ 10,100
Restricted Cash and Cash Equivalents, Total		1,500	0
Geographic Distribution, Foreign [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance		700	6,400
Restricted Cash and Cash Equivalents, Total		$ 1,100	$ 1,200