COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Tables)

9 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of inventory

Inventory is stated at the lower of cost (first-in, first-out) or net realizable value and consists of the following (in thousands):

	March 31, 2021		June 30, 2020
Raw materials /purchased components	$	4,555	$	4,241
Work in process		1,901		2,339
Sub-assemblies/finished components		1,661		1,438
Finished goods		251		220
Total inventory	$	8,368	$	8,238

Schedule of investments

Investments are stated at market value and consist of the following (in thousands):

	March 31, 2021		June 30, 2020
Marketable equity securities - short-term	$	1,123	$	2,560
Marketable equity securities - long-term		3,026		2,360
Total marketable equity securities	$	4,149	$	4,920

Schedule of land and building

Land and building consist of the following (in thousands):

	March 31, 2021			June 30, 2020
Land	$	3,684		$	—
Building		2,815			—
Total		6,499			—
Less: accumulated depreciation		(39	)		—
	$	6,460		$	—

Schedule of intangibles

Intangibles consist of the following (in thousands):

	March 31, 2021			June 30, 2020
Patent-related costs	$	234		$	222
Less accumulated amortization		(71	)		(60	)
	$	163		$	162