v3.25.2
S-K 1604(c) De-SPAC Dilution
 3 Months Ended
Mar. 31, 2025
USD ($)
$ / shares
shares
No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Per Share (in Dollars per share) | $ / shares $ 10
De-SPAC, Net Tangible Book Value, Adjusted $ 272,926,000
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 33,750,000
De-SPAC, Net Tangible Book Value, Adjusted, Per Share (in Dollars per share) | $ / shares $ 8.09
De-SPAC, Net Tangible Book Value, Amount of Dilution Per Share (in Dollars per share) | $ / shares $ 1.91
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 998,845
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 99,884,532
Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Per Share (in Dollars per share) | $ / shares $ 10
De-SPAC, Net Tangible Book Value, Adjusted $ 238,512,000
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 30,419,464
De-SPAC, Net Tangible Book Value, Adjusted, Per Share (in Dollars per share) | $ / shares $ 7.84
De-SPAC, Net Tangible Book Value, Amount of Dilution Per Share (in Dollars per share) | $ / shares $ 2.16
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 965,540
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 96,553,996
Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Per Share (in Dollars per share) | $ / shares $ 10
De-SPAC, Net Tangible Book Value, Adjusted $ 204,098,000
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 27,088,927
De-SPAC, Net Tangible Book Value, Adjusted, Per Share (in Dollars per share) | $ / shares $ 7.53
De-SPAC, Net Tangible Book Value, Amount of Dilution Per Share (in Dollars per share) | $ / shares $ 2.47
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 932,235
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 93,223,459
Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Per Share (in Dollars per share) | $ / shares $ 10
De-SPAC, Net Tangible Book Value, Adjusted $ 169,684,000
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 23,758,391
De-SPAC, Net Tangible Book Value, Adjusted, Per Share (in Dollars per share) | $ / shares $ 7.14
De-SPAC, Net Tangible Book Value, Amount of Dilution Per Share (in Dollars per share) | $ / shares $ 2.86
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 898,929
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 89,892,923
Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Per Share (in Dollars per share) | $ / shares $ 10
De-SPAC, Net Tangible Book Value, Adjusted $ 135,270,000
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 20,427,854
De-SPAC, Net Tangible Book Value, Adjusted, Per Share (in Dollars per share) | $ / shares $ 6.62
De-SPAC, Net Tangible Book Value, Amount of Dilution Per Share (in Dollars per share) | $ / shares $ 3.38
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 865,624
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 86,562,386
Public Units [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 23,000,000
Public Units [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 19,669,464
Public Units [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 16,338,927
Public Units [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 13,008,391
Public Units [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 9,677,854
Founder Shares [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,750,000
Founder Shares [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,750,000
Founder Shares [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,750,000
Founder Shares [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,750,000
Founder Shares [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,750,000
PIPE Shares [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,000,000
PIPE Shares [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,000,000
PIPE Shares [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,000,000
PIPE Shares [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,000,000
PIPE Shares [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Number of Shares Used to Determine Net Tangible Book Value, Adjusted (in Shares) | shares 5,000,000
HCM II Shares [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 337,500
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 33,750,000
HCM II Shares [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 304,195
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 30,419,464
HCM II Shares [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 270,889
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 27,088,927
HCM II Shares [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 237,584
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 23,758,391
HCM II Shares [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 204,279
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 20,427,854
Terrestrial Energy Shares [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 661,345
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 66,134,532
Terrestrial Energy Shares [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 661,345
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 66,134,532
Terrestrial Energy Shares [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 661,345
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 66,134,532
Terrestrial Energy Shares [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 661,345
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 66,134,532
Terrestrial Energy Shares [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Company Valuation at which Shares not Redeemed are at least IPO Value per Share $ 661,345
De-SPAC, Number of Shares Used, Adjustment (in Shares) | shares 66,134,532
HCM II’s Net Tangible Book Value [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted $ (12,080,000)
HCM II’s Net Tangible Book Value [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (12,080,000)
HCM II’s Net Tangible Book Value [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (12,080,000)
HCM II’s Net Tangible Book Value [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (12,080,000)
HCM II’s Net Tangible Book Value [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (12,080,000)
Transaction Costs Attributed to HCM II [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (3,320,000)
Transaction Costs Attributed to HCM II [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (3,320,000)
Transaction Costs Attributed to HCM II [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (3,320,000)
Transaction Costs Attributed to HCM II [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (3,320,000)
Transaction Costs Attributed to HCM II [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted (3,320,000)
PIPE Financing [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 50,670,000
PIPE Financing [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 50,670,000
PIPE Financing [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 50,670,000
PIPE Financing [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 50,670,000
PIPE Financing [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 50,670,000
Funds Released from Trust [Member] | No Redemption [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 237,656,000
Funds Released from Trust [Member] | Redemption at 25 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 203,242,000
Funds Released from Trust [Member] | Redemption at 50 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 168,828,000
Funds Released from Trust [Member] | Redemption at 75 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted 134,414,000
Funds Released from Trust [Member] | Redemption at 100 Percent of Maximum [Member]  
De-SPAC, Net Tangible Book Value [Line Items]  
De-SPAC, Net Tangible Book Value, Adjusted $ 100,000,000