Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Mar. 31, 2022		Dec. 31, 2021
Current assets:
Cash and cash equivalents		$ 130,006		$ 239,278
Marketable securities at fair value		42,927		43,343
Restricted cash and cash equivalents (primarily related to VIEs)		111,127		104,166
Receivables:
Trade less allowance for credit losses of $90 and $90, respectively (primarily related to VIEs)		116,555		122,944
Other		20,756		18,144
Inventories		32,888		28,445
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	11,522		9,692
Prepaid expenses and other		42,208		35,920
Total current assets		507,989		601,932
Investment in unconsolidated companies		112,522		105,886
Deposits and other		70,398		78,915
Deferred income taxes		138,709		143,450
Property, plant and equipment, net		2,293,720		2,294,973
Construction-in-process		819,560		721,483
Operating leases right of use		19,753		19,357
Finance leases right of use		5,762		6,414
Intangible assets, net		355,185		363,314
Goodwill		90,591		89,954
Total assets		4,414,189	[2],[3]	4,425,678
Current liabilities:
Accounts payable and accrued expenses		164,752		143,186
Billings in excess of costs and estimated earnings on uncompleted contracts		10,964		9,248
Current portion of long-term debt:
Limited and non-recourse (primarily related to VIEs)		77,190		61,695
Full recourse		313,178		313,846
Financing liability		13,039		10,835
Operating lease liabilities		2,490		2,564
Finance lease liabilities		2,378		2,782
Total current liabilities		583,991		544,156
Long-term debt, net of current portion:
Financing liability		236,057		242,029
Operating lease liabilities		17,082		16,462
Finance lease liabilities		4,075		4,361
Liability associated with sale of tax benefits		129,381		134,953
Deferred income taxes		83,352		84,662
Liability for unrecognized tax benefits		6,034		5,730
Liabilities for severance pay		15,552		15,694
Asset retirement obligation		86,109		84,891
Other long-term liabilities		4,374		4,951
Total liabilities		2,389,932		2,417,888
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		9,408		9,329
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 56,071,682 and 56,056,450 issued and outstanding as of March 31, 2022 and December 31, 2021, respectively		56		56
Additional paid-in capital		1,274,838		1,271,925
Retained earnings		596,912		585,209
Accumulated other comprehensive income (loss)		(1,137)		(2,191)
Total stockholders' equity attributable to Company's stockholders		1,870,669		1,854,999
Noncontrolling interest		144,180		143,462
Total equity		2,014,849		1,998,461
Total liabilities, redeemable noncontrolling interest and equity		4,414,189		4,425,678
Senior Secured Notes [Member]
Long-term debt, net of current portion:
Limited and non-recourse (primarily related to VIEs and less deferred financing costs of $10,712 and $11,304, respectively)		507,520		539,664
Senior Unsecured Bonds [Member]
Long-term debt, net of current portion:
Full recourse (less deferred financing costs of $3,346 and $3,659, respectively)		$ 716,405		$ 740,335

[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 fully recognized as product revenues during the three months ended March 31, 2022 as a result of performance obligations having not been fully satisfied yet.

[2] Electricity segment assets include goodwill in the amount of $86.0 million and $20.1 million as of March 31, 2022 and 2021, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and $4.1 as of March 31, 2022 and 2021, respectively. No goodwill is included in the Product segment assets as of March 31, 2022 and 2021.

[3] Including unconsolidated investments