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Note 11 - Debt (Details Textual) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 30, 2018 | Mar. 31, 2018 USD ($) | Mar. 31, 2018 USD ($) | Jun. 30, 2018 | Mar. 31, 2018 EUR (€)
Term Loans [Member] |  |  |  |  |
Interest Expense, Debt, Total |  | $ 9,815 | $ 9,815 |  |
Revolving Credit Facility A [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 61,600 | $ 61,600 |  | € 50,000
Debt Instrument, Interest Rate, Stated Percentage |  | 3.50% | 3.50% |  | 3.50%
Term Loan A [Member] | Term Loans [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.80% | 4.80% |  | 4.80%
Debt Instrument, Prepayment Penalty, Percentage |  | 3.00% | 3.00% |  | 3.00%
Term Loan B [Member] | Term Loans [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage |  | 0.00% | 0.00% |  | 0.00%
Term Loan B [Member] | Term Loans [Member] | Euribor [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.50% |  |  |
Term Loan C [Member] | Term Loans [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.29% | 4.29% |  | 4.29%
Debt Instrument, Prepayment Penalty, Percentage |  | 0.00% | 0.00% |  | 0.00%
Term Loan D [Member] | Term Loans [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |
Term Loan D [Member] | Term Loan C [Member] |  |  |  |  |
Debt Instrument, Prepayment Penalty, Percentage |  | 0.50% | 0.50% |  | 0.50%
Term Loan D [Member] | Term Loan C [Member] | Scenario, Forecast [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.44% |
Term Loan D [Member] | Term Loan C [Member] | Euribor [Member] | Scenario, Forecast [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.44% |  |  |  |
Revolving Credit Facility B [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 61,600 | $ 61,600 |  | € 50,000
Debt Instrument, Interest Rate, Stated Percentage |  | 3.95% | 3.95% |  | 3.95%
Revolving Credit Facility C [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 61,600 | $ 61,600 |  | € 50,000
Debt Instrument, Interest Rate, Stated Percentage |  | 3.00% | 3.00% |  | 3.00%
Collateral Pledged [Member] | Term Loans [Member] |  |  |  |  |
Restricted Cash, Total |  | $ 428,425 | $ 428,425 |  |
Collateral Pledged [Member] | Loan with Ministry of Industry, Tourism, and Commerce, Due December 31, 2018 [Member] | Genasys Acquisition [Member] | Loans With Governmental Agencies [Member] |  |  |  |  |
Restricted Cash, Total |  | 26,113 | 26,113 |  |
Collateral Pledged [Member] | Loan with Ministry of Industry, Tourism, and Commerce, Due December 31, 2019 [Member] | Genasys Acquisition [Member] | Loans With Governmental Agencies [Member] |  |  |  |  |
Restricted Cash, Total |  | $ 40,373 | $ 40,373 |  |
Cash Pledged as Collateral, Percentage of the Original Principal Received |  | 25.00% | 25.00% |  | 25.00%
Collateral Pledged [Member] | Loan with Ministry of Industry, Tourism, and Commerce, Due January 31, 2020 [Member] | Genasys Acquisition [Member] | Loans With Governmental Agencies [Member] |  |  |  |  |
Restricted Cash, Total |  | $ 63,774 | $ 63,774 |  |
Cash Pledged as Collateral, Percentage of the Original Principal Received |  | 35.00% | 35.00% |  | 35.00%
Collateral Pledged [Member] | Loan with Ministry of Science and Innovation, Due February 2, 2024 [Member] | Genasys Acquisition [Member] | Loans With Governmental Agencies [Member] |  |  |  |  |
Restricted Cash, Total |  | $ 296,440 | $ 296,440 |  |
Cash Pledged as Collateral, Percentage of the Original Principal Received |  | 66.60% | 66.60% |  | 66.60%

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