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Note 12 - Significant Transactions (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 5 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Mar. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019
Payments to Acquire Businesses, Gross |  |  |  |  |  | $ (0) | $ 2,555
Amortization of Intangible Assets, Total |  |  | $ 3,512 | $ 1,658 |  | 6,866 | 3,330
Amortization of Inventory Step-up Cost |  |  |  |  |  | (436) | 0
Goodwill, Ending Balance |  |  | 156,365 |  | $ 141,536 | 156,365 |
Share-based Payment Arrangement, Expense |  |  | $ 2,008 | $ 1,182 |  | $ 3,276 | $ 2,050
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | (12.40%) | 16.00% |  | (24.20%) | 14.80%
GPT Acquisition [Member] |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 181,547 |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles |  |  |  |  |  | $ (6,002) |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory |  |  |  |  |  | (3,752) |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment |  |  |  |  |  | 878 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities |  |  |  |  |  | 2,010 |
Amortization of Intangible Assets, Total |  |  |  |  |  | (344) | $ 4,057
Inventory Step-up Cost | 8,066 |  |  |  |  |  |
Amortization of Inventory Step-up Cost |  |  |  |  | $ 8,502 | (436) |
Goodwill, Ending Balance | 84,028 | [1] | $ 84,028 |  |  | 84,028 |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  | 15,080 |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  | $ (2,083) |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  |  |  |  | 25.00%
GPT Acquisition [Member] | Key GPT Employees [Member] | Performance Stock Units [Member] |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  | $ 351
GPT Acquisition [Member] | Customer Relationships [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  |  | 10 years |
GPT Acquisition [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  |  | 10 years |
GPT Acquisition [Member] | Cost of Sales [Member] |  |  |  |  |  |  |
Amortization of Intangible Assets, Total |  |  |  |  |  | $ 178 |
GPT Acquisition [Member] | General and Administrative Expense [Member] |  |  |  |  |  |  |
Amortization of Intangible Assets, Total |  |  |  |  |  | (522) |
Depreciation, Total |  |  | $ 207 |  |  |  |
GPT Acquisition [Member] | General and Administrative Expense [Member] | Biopharmaceutical Development [Member] |  |  |  |  |  |  |
Amortization of Intangible Assets, Total | $ 473 |  |  |  |  | $ 1,409 |
[1] | Acquired goodwill of [$84,028], all of which is allocated to the Biopharmaceutical Development reportable segment, represents the value expected to arise from organic revenues growth projections that are expected to exceed that of our legacy divisions, and the opportunity to expand into a new market with well-established market share. The goodwill acquired is not deductible for income tax purposes.

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