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Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | ---
Accounts receivable (billed) | $ 7,897 | $ 11,276
Accounts receivable (unbilled) | 4,201 | 5,711
Less: Allowance for doubtful accounts | (15) |
Accounts receivable, net | $ 12,083 | $ 16,987

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