Note 3 - Valuation and Qualifying Accounts

12 Months Ended

Mar. 31, 2021

Notes to Financial Statements

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

(3) Valuation and Qualifying Accounts

Activity in the Company's valuation and qualifying accounts consists of the following (in thousands):

	Year Ended March 31,
	2021			2020			2019
Allowance for doubtful accounts:
Balance at beginning of period	$	59		$	39		$	35
Provision for doubtful accounts		130			191			85
Write-off of uncollectible accounts receivable		(150	)		(171	)		(81	)
Balance at end of year	$	39		$	59		$	39