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Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Mar. 31, 2019
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Accounts receivable (billed) | $ 6,079 | $ 5,642
Accounts receivable (unbilled) | 3,994 | 2,213
Accounts receivable, net | $ 10,073 | $ 7,855

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