NOTE 6 - COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS - Information relating to uncompleted contracts (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Notes to Financial Statements
Costs incurred on uncompleted contracts	$ 559	$ 448
Estimated earnings	653	309
Costs and estimated earnings on uncompleted contracts	1,212	757
Less: Billings to date	994	604
Total costs and estimated earnings in excess of billings on uncompleted contracts	$ 218	$ 153

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c)(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant