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Fair Value Measurements - Acquisitions (Details)	Sep. 12, 2022 USD ($) $ / shares shares	Sep. 09, 2022 USD ($) shares	May 03, 2021 USD ($)	May 03, 2021 EUR (€)	Feb. 23, 2021 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2023 EUR (€)	Apr. 30, 2022 USD ($)
Fair Value Measurement
Fair value of the contingently returnable consideration								$ 143,000
Amprius Technologies, Inc.
Fair Value Measurement
Company Invested amount	$ 5,000,000
Amprius Technologies, Inc. | Equity securities
Fair Value Measurement
Number of shares purchased | shares	500,000
Amprius Technologies, Inc. | Redeemable warrant
Fair Value Measurement
Number of warrants acquired | shares	500,000
Exercise Price of warrants | $ / shares	$ 12.50
Redemption price | $ / shares	$ 20.00
Amprius Technologies, Inc. | Redeemable warrant | Measurement Input, Exercise Price
Fair Value Measurement
Investment in warrants | $ / shares	11.50
Amprius Technologies, Inc. | Redeemable warrant | Measurement Input, Redemption Price
Fair Value Measurement
Investment in warrants | $ / shares	18.00
Nauticus Robotics, Inc. | Equity securities
Fair Value Measurement
Company Invested amount		$ 100,000
Number of shares purchased | shares		10,000
Intelligent Systems Group
Fair Value Measurement
Total					$ 29,700,000
Contingent consideration paid					6,000,000
Additional cash consideration					$ 35,371,000
Period to obtain target					3 years
Intelligent Systems Group | Maximum
Fair Value Measurement
Total					$ 6,000,000
Intelligent Systems Group | Business Combination, Specific Revenue Targets Achieved In First Earnout Year
Fair Value Measurement
Released from escrow								$ 2,000,000
Intelligent Systems Group | Business Combination Specific Revenue Targets Achieved in Second and Third Earnout Year
Fair Value Measurement
Released from escrow						$ 2,000,000
Telerob
Fair Value Measurement
Period to obtain target			36 months	36 months
Amount of earnout amount not achieved | €							€ 2,000,000
Amount of second year earnout amount not achieved						$ 2,203,000	€ 2,000,000
Telerob | Maximum
Fair Value Measurement
Additional cash consideration			$ 6,609,000	€ 6,000,000

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The amount of contingent consideration transferred.

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Number of warrants acquired.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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