Variable Interest Entities - Assets and liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents		$ 295,844	$ 205,693
Prepaid expenses, tax credits and other current assets		112,068	139,845
Total current assets		1,533,914	1,477,484
Property, plant, and equipment, net		879,850	866,329
Total assets	[1]	3,633,406	3,602,846
Liabilities
Accounts payable		191,611	180,966
Accrued expenses		128,857	103,145
Total liabilities		788,385	748,489
Equity
Equity		1,932,587	1,807,756	$ 2,929,122	$ 2,898,125
Total equity		1,932,587	1,807,756	$ 2,929,122	$ 2,898,125
Total liabilities and equity		3,633,406	3,602,846
Variable interest entities
Assets
Cash and cash equivalents		408	667
Prepaid expenses, tax credits and other current assets		7	242
Total current assets		415	909
Property, plant, and equipment, net		155,926	147,696
Total assets		156,341	148,605
Liabilities
Accounts payable		1,780	1,340
Accrued expenses		3,786	27
Total liabilities		5,566	1,367
Equity
Equity		150,775	147,238
Total equity		150,775	147,238
Total liabilities and equity		$ 156,341	$ 148,605

[1] Includes balances associated with a consolidated variable interest entity (“VIE”), including amounts reflected in “total assets” that can only be used to settle obligations of the VIE of $156,341 and $148,605 as of March 31, 2025 and December 31, 2024, respectively, as well as liabilities of the VIE reflected within “total liabilities” for which creditors do not have recourse to the general credit of Plug Power Inc. of $5,566 and $1,367 as of March 31, 2025 and December 31, 2024, respectively. Refer to Note 20, “Variable Interest Entities”, for additional information.