Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Jun. 30, 2021		Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 250,009		$ 448,252
Marketable securities at fair value		45,960		0
Restricted cash and cash equivalents (primarily related to VIEs)		79,868		88,526
Receivables:
Trade less allowance for credit losses of $419 and $597, respectively (primarily related to VIEs)		137,688		149,170
Other		11,881		17,987
Inventories		28,526		35,321
Costs and estimated earnings in excess of billings on uncompleted contracts	[1]	13,837		24,544
Prepaid expenses and other		20,220		15,354
Total current assets		587,989		779,154
Investment in unconsolidated companies		103,890		98,217
Deposits and other		57,347		66,989
Deferred income taxes		124,284		119,299
Property, plant and equipment, net		2,175,637		2,099,046
Construction-in-process		531,634		479,315
Operating leases right of use		19,765		16,347
Finance leases right of use		7,633		11,633
Intangible assets, net		185,508		194,421
Goodwill		24,863		24,566
Total assets		3,818,550	[2],[3]	3,888,987
Current liabilities:
Accounts payable and accrued expenses		108,408		152,763
Billings in excess of costs and estimated earnings on uncompleted contracts		13,452		11,179
Current portion of long-term debt:
Senior secured notes		25,144		24,949
Other loans		36,265		35,897
Full recourse		56,843		17,768
Operating lease liabilities		2,978		2,922
Finance lease liabilities		3,139		3,169
Total current liabilities		246,229		248,647
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $4,852 and $5,318, respectively)		301,330		315,195
Senior unsecured bonds (less deferred financing costs of $1,906 and $2,086, respectively)		674,643		717,534
Operating lease liabilities		16,531		12,897
Finance lease liabilities		5,190		9,104
Liability associated with sale of tax benefits		101,883		111,476
Deferred income taxes		88,156		87,972
Liability for unrecognized tax benefits		3,464		1,970
Liabilities for severance pay		17,691		18,749
Asset retirement obligation		65,342		63,457
Other long-term liabilities		6,094		6,235
Total liabilities		1,848,824		1,937,720
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest		9,871		9,830
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 55,997,406 and 55,983,259 issued and outstanding as of June 30, 2021 and December 31, 2020, respectively		56		56
Additional paid-in capital		1,267,451		1,262,446
Retained earnings		565,222		550,103
Accumulated other comprehensive income (loss)		(7,646)		(6,620)
Total stockholders' equity attributable to Company's stockholders		1,825,083		1,805,985
Noncontrolling interest		134,772		135,452
Total equity		1,959,855		1,941,437
Total liabilities, redeemable noncontrolling interest and equity		3,818,550		3,888,987
Other Loans, Limited and Non-recourse [Member]
Long-term debt, net of current portion:
Other loans (less deferred financing costs)		267,310		284,928
Other Loans, Full Recourse [Member]
Long-term debt, net of current portion:
Other loans (less deferred financing costs)		$ 54,961		$ 59,556

[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 six months ended June 30, 2021 as a result of performance obligations having not been satisfied yet.

[2] Electricity segment assets include goodwill in the amount of $20.2 million and $20.1 million as of June 30, 2021 and 2020, respectively. Energy Storage segment assets include goodwill in the amount of $4.6 million and none as of June 30, 2021 and 2020, respectively. No goodwill is included in the Product segment assets as of June 30, 2021 and 2020.

[3] Including unconsolidated investments