Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 267,802		$ 448,252
Marketable securities at fair value		45,479		0
Restricted cash and cash equivalents (primarily related to VIEs)		88,498		88,526
Receivables:
Trade less allowance for credit losses of $253 and $597, respectively (primarily related to VIEs)		140,314		149,170
Other		27,346		17,987
Inventories		27,356		35,321
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	9,324		24,544
Prepaid expenses and other		29,320		15,354
Total current assets		635,439		779,154
Investment in unconsolidated companies		109,725		98,217
Deposits and other		61,716		66,989
Deferred income taxes		149,178		119,299
Property, plant and equipment, net		2,298,903		2,099,046
Construction-in-process		615,482		479,315
Operating leases right of use		19,690		16,347
Finance leases right of use		7,002		11,633
Intangible assets, net		370,889		194,421
Goodwill		91,342		24,566
Total assets		4,359,366	[2],[3]	3,888,987
Current liabilities:
Accounts payable and accrued expenses		127,432		152,763
Billings in excess of costs and estimated earnings on uncompleted contracts		15,829		11,179
Current portion of long-term debt:
Senior secured notes		25,391		24,949
Other loans		36,203		35,897
Full recourse		312,661		17,768
Operating lease liabilities		2,902		2,922
Finance liabilities		13,854		3,169
Total current liabilities		534,272		248,647
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $4,640 and $5,318, respectively)		296,382		315,195
Operating lease liabilities		16,650		12,897
Finance liabilities		246,722		9,104
Liability associated with sale of tax benefits		97,714		111,476
Deferred income taxes		85,922		87,972
Liability for unrecognized tax benefits		3,677		1,970
Liabilities for severance pay		16,598		18,749
Asset retirement obligation		71,628		63,457
Other long-term liabilities		6,009		6,235
Total liabilities		2,377,468		1,937,720
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		9,542		9,830
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 56,001,501 and 55,983,259 issued and outstanding as of September 30, 2021 and December 31, 2020, respectively		56		56
Additional paid-in capital		1,269,568		1,262,446
Retained earnings		573,408		550,103
Accumulated other comprehensive income (loss)		(9,647)		(6,620)
Total stockholders' equity attributable to Company's stockholders		1,833,385		1,805,985
Noncontrolling interest		138,971		135,452
Total equity		1,972,356		1,941,437
Total liabilities, redeemable noncontrolling interest and equity		4,359,366		3,888,987
Other Loans, Limited and Non-recourse [Member]
Long-term debt, net of current portion:
Other loans (less deferred financing costs)		258,916		284,928
Senior Unsecured Bonds [Member]
Long-term debt, net of current portion:
Full recourse (less deferred financing costs of $3,659 and $3,426, respectively)		$ 742,978		$ 777,090

[1] Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not yet recognized as product revenues during the nine months ended September 30, 2021 as a result of performance obligations having not been satisfied yet.

[2] Electricity segment assets include goodwill in the amount of $86.7 million and $20.1 million as of September 30, 2021 and 2020, respectively, $66.6 million of which were added in the third quarter of 2021 as a result of the geothermal asset purchase transaction as further detailed under Note 1 to the condensed consolidated financial statements. Energy Storage segment assets include goodwill in the amount of $4.6 million and $3.5 as of September 30, 2021 and 2020, respectively. No goodwill is included in the Product segment assets as of September 30, 2021 and 2020.??

[3] Including unconsolidated investments