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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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- Definition

Represents the amount of cash pledged as collateral, expressed as a percentage of the original principal received.

+ References

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- Definition

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+ References

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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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-Publisher FASB
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-Topic 470
-SubTopic 20
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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