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Debt - Additional Information (Details) |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |
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Jun. 18, 2021 EUR (€) | Jun. 04, 2021 EUR (€) | Apr. 09, 2021 EUR (€) | Jul. 01, 2020 | Jun. 25, 2020 EUR (€) | Jun. 05, 2020 | May 11, 2020 USD ($) | Apr. 24, 2020 USD ($) $ / shares | Apr. 09, 2020 EUR (€) | Apr. 01, 2019 USD ($) | Apr. 01, 2019 EUR (€) | Sep. 30, 2019 USD ($) | Apr. 30, 2019 USD ($) Individual $ / shares shares | Sep. 30, 2017 USD ($) | Sep. 30, 2021 | Dec. 31, 2021 USD ($) LineofCredit TermLoan $ / shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2021 EUR (€) LineofCredit TermLoan | May 03, 2021 USD ($) | Dec. 31, 2020 EUR (€) | Sep. 30, 2019 EUR (€) | Apr. 01, 2019 EUR (€) | Sep. 30, 2017 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,728,560 |  |  |  |  |  |  |
Debt discount amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 146,294 | $ 376,004 |  |  |  |  |  |
Proceeds from loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,307,818 |  |  |  |  |  |  |
Common stock, par value | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0001 | $ 0.0001 |  |  |  |  |  |
April 2019 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 63,188 |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 350,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |  |  |  |  |  |  |  |  |  |
Debt instrument, monthly / quarterly principal and interest payments |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,100 |  |  |  |  |  |  |  |  |  |
Number of individuals | Individual |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Debt maturity term |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock percentage equal to original principal |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.15 |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock | shares |  |  |  |  |  |  |  |  |  |  |  |  | 16,276 |  |  |  |  |  |  |  |  |  |
Estimated fair value of each warrants | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.90 |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.15 |  |  |  |  |  |  |
April 2019 Notes | Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the warrant issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,037 |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Warrants | Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.15 |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Warrants | Contractual Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Warrants | Volatility Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.4460 |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Warrants | Dividend Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.000 |  |  |  |  |  |  |  |  |  |
April 2019 Notes | Warrants | Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.02307 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Board of Directors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 206,669 |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,150,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |  |  |  |  |  |  |  |  |  |
Debt instrument, monthly / quarterly principal and interest payments |  |  |  |  |  |  |  |  |  |  |  |  | $ 52,900 |  |  |  |  |  |  |  |  |  |
Debt maturity term |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock percentage equal to original principal |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.15 |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock | shares |  |  |  |  |  |  |  |  |  |  |  |  | 53,490 |  |  |  |  |  |  |  |  |  |
Estimated fair value of each warrants | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.90 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the warrant issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 46,121 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants | Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.15 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants | Contractual Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants | Volatility Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.4260 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants | Dividend Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.000 |  |  |  |  |  |  |  |  |  |
April 2019 Related Party Notes | Warrants | Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions |  |  |  |  |  |  |  |  |  |  |  |  | 0.023067 |  |  |  |  |  |  |  |  |  |
April 2019 Notes and Related Party Notes | Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,077 | 25,107 |  |  |  |  |  |
PPP Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from loan |  |  |  |  |  |  | $ 1,499,360 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan forgiveness period |  |  |  |  |  | 168 days | 56 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of payroll requirement |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of funds spend on other eligible expenses |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Existing loans original term |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renegotiated term under payback Protection Program Flexibility Act |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan fully forgiven |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,499,360 |  |  |  |
Accrued interest fully forgiven |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,994 |  |  |  |
PPP Loan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payroll costs exclude compensation of individual employee |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reduction in salaries and wages for employees |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PPP Loan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of forgiven amount for non-payroll costs |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salaries and wages for employees |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PPP Loan | Two Year Promissory Note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date |  |  |  |  |  |  | Apr. 28, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Secured Convertible Promissory Notes | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  | Apr. 01, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-interest bearing convertible note |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |
Common stock, par value | $ / shares |  |  |  |  |  |  |  | $ 0.0001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, initial conversion price per share | $ / shares |  |  |  |  |  |  |  | $ 2.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original issue discount rate |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, aggregate purchase price |  |  |  |  |  |  |  | $ 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-interest bearing convertible note expiration date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 24, 2021 |  |  |  |  |  |  |
Debt instrument, conversion price percentage, eligibility of conversion |  |  |  |  |  |  |  | 135.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly amortization payments percentage of initial principal |  |  |  | 0.04545% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price percentage |  |  |  | 105.00% |  |  |  |  |  |  |  |  |  |  |  | 110.00% |  |  |  |  |  |  |
Debt instrument, conversion description |  |  |  |  |  |  |  | Subject to the satisfaction of certain equity conditions set forth in the notes, installment amounts may be satisfied in shares of our common stock, with such installment conversion at a conversion price equal to the lower of (i) the conversion price then in effect; and (ii) the greater of (x) the floor price of $1.00 (80% of the Nasdaq market price at date of purchase agreement) and (y) the lower of (I) 82.5% the volume weighted average price of our common stock on the trading day immediately before the applicable installment date and (II) 82.5% of the quotient of (A) the sum of the volume weighted average price of our common stock for each of the three (3) trading days with the lowest volume weighted average price of our common stock during the twenty (20) consecutive trading day period ending and including the trading day immediately prior to the applicable installment date, divided by (B) three (3). |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of market price |  |  |  |  |  |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume weighted average price of common stock period |  |  |  |  |  |  |  | 3 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume weighted average price period |  |  |  |  |  |  |  | 20 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of trading days, shares pre-delivered |  |  |  |  |  |  |  | 2 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 139,217 | 168,395 |  |  |  |  |  |
Original issue discount rate |  |  |  |  |  |  |  | $ 316,274 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs amortized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 137,521 | 177,530 |  |  |  |  |  |
Senior Secured Convertible Promissory Notes | Minimum | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt conversion floor price | $ / shares |  |  |  |  |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume weighted average price percentage |  |  |  |  |  |  |  | 82.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Secured Convertible Promissory Notes | Maximum | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-interest bearing convertible note |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume weighted average price percentage |  |  |  |  |  |  |  | 82.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bressner Technology GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of term loans outstanding | TermLoan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  | 2 |  |  |  |  |
Debt instrument, face amount | € | € 500,000 | € 500,000 | € 500,000 |  | € 500,000 |  |  |  | € 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bressner Technology GmbH | Term Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,137,651 |  | € 1,000,000 |  |  |  |  |
Bressner Technology GmbH | Note Payable Maturing on March 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,251 |  |  | € 66,446 |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 586,189 |  |  |  |  |  |  |  |  |  |  |  | € 500,000 |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  | 2.25% |
Debt instrument, maturity date |  |  |  |  |  |  |  |  |  | Mar. 30, 2021 | Mar. 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, monthly / quarterly principal and interest payments |  |  |  |  |  |  |  |  |  | $ 24,960 | € 22,232 |  |  |  |  |  |  |  |  |  |  |  |
Bressner Technology GmbH | Note Payable Maturing on March 24, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 336,810 |  |  |  |  |  |  |  |  | € 300,000 |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  | 1.65% |  |  |  |  |  |  |  |  | 1.65% |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  |  |  |  | Mar. 24, 2020 |  |  |  |  |  |  |  |  |  |  |
Bressner Technology GmbH | Note Payable Maturing on January 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 436,272 |  |  |  |  |  |  |  |  | € 400,000
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.125% |  |  |  |  |  |  |  |  | 2.125%
Debt instrument, maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  | Jan. 31, 2020 |  |  |  |  |  |  |  |  |
Term Loans | Bressner Technology GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 568,826 | 611,406 | € 500,000 |  | € 500,000 |  |  |
Debt instrument, interest rate | 1.55% | 1.55% | 1.60% |  | 1.87% |  |  |  | 1.90% |  |  |  |  |  | 1.57% |  |  |  |  |  |  |  |
Debt instrument, maturity date | Dec. 17, 2021 | Nov. 30, 2021 | Sep. 30, 2021 |  | Jun. 18, 2021 |  |  |  | Apr. 09, 2021 |  |  |  |  |  | Mar. 31, 2022 |  |  |  |  |  |  |  |
Debt instrument, extended maturity date | Jun. 17, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
German Institutions | Revolving Credit Facility | Bressner Technology GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lines of credit | LineofCredit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  | 3 |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,640,483 |  | € 3,200,000 |  |  |  |  |
Total outstanding balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |  |  |
German Institutions | Revolving Credit Facility | Bressner Technology GmbH | Line of Credit Facility One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit current rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.10% |  |  |  |  |  |  |
German Institutions | Revolving Credit Facility | Bressner Technology GmbH | Line of Credit Facility Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit current rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |
Line of Credit from UniCredit Bank | Term Loans | Bressner Technology GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total balance outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 568,825 |  |  |  |  |  |  |

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