Subsequent Events	9 Months Ended
Jan. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	(19) Subsequent Events On February 1, 2021, the Company entered into a unit purchase agreement (the “3dent Agreement”), pursuant to which the Company acquired all of the outstanding equity interest of 3dent Technology, LLC (“3dent”), a Houston, Texas based company that offers offshore energy engineering and design services that are complementary to OPT’s technology and products. In consideration for the purchase, the Company issued 361,991 shares of its common stock to the sellers with an agreed value of $800,000 based on the closing price of the Company’s common stock on the date that the Company agreed to terms with 3dent. In addition, the former owners of 3dent will be eligible for awards of performance stock with a potential value of $360,000 if certain revenue targets are achieved over the next 12 months. The 3dent Agreement includes a number of other standard representations, warranties, covenants and indemnifications. The Company is accounting for the transaction as a business combination under ASC 805, “Business Combinations.” Accordingly, the assets acquired and the liabilities assumed will be recorded at their estimated fair value on the date of acquisition. Goodwill from the acquisition principally relates to excess value of the purchase price over the fair value of identified net assets and liabilities. Under ASC 805, acquisition-related transaction costs (such as advisory, legal, valuation, other professional fees) have been expensed in the statement of operations in the period incurred.

Subsequent Events

9 Months Ended

Jan. 31, 2021

(19) Subsequent Events

On February 1, 2021, the Company entered into a unit purchase agreement (the “3dent Agreement”), pursuant to which the Company acquired all of the outstanding equity interest of 3dent Technology, LLC (“3dent”), a Houston, Texas based company that offers offshore energy engineering and design services that are complementary to OPT’s technology and products. In consideration for the purchase, the Company issued 361,991 shares of its common stock to the sellers with an agreed value of $800,000 based on the closing price of the Company’s common stock on the date that the Company agreed to terms with 3dent. In addition, the former owners of 3dent will be eligible for awards of performance stock with a potential value of $360,000 if certain revenue targets are achieved over the next 12 months. The 3dent Agreement includes a number of other standard representations, warranties, covenants and indemnifications.

The Company is accounting for the transaction as a business combination under ASC 805, “Business Combinations.” Accordingly, the assets acquired and the liabilities assumed will be recorded at their estimated fair value on the date of acquisition. Goodwill from the acquisition principally relates to excess value of the purchase price over the fair value of identified net assets and liabilities. Under ASC 805, acquisition-related transaction costs (such as advisory, legal, valuation, other professional fees) have been expensed in the statement of operations in the period incurred.