CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net earnings	$ 9,361,000	$ 2,597,000
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation	2,289,000	3,256,000
Amortization of credit facility fees	42,000	47,000
Stock-based compensation	256,000	243,000
Deferred income taxes	(1,822,000)	(659,000)
(Benefit) Provision for contingent obligation	(112,000)	367,000
Gains on equity investments	(4,000)	(125,000)
Gain on sale of land	(4,843,000)	(4,325,000)
Changes in assets and liabilities:
Accounts receivable	(587,000)	(1,190,000)
Inventories	0	1,000
Prepaid expenses and other	171,000	(5,159,000)
Income taxes receivable/payable	2,957,000	(213,000)
Accounts payable	658,000	129,000
Accrued liabilities	(266,000)	38,000
Payable to Dover Downs Gaming & Entertainment, Inc.	0	(9,000)
Contract liabilities	449,000	3,386,000
Liability for pension benefits	(109,000)	(48,000)
Net cash provided by (used in) operating activities	8,440,000	(1,664,000)
Investing activities:
Capital expenditures	(545,000)	(4,651,000)
Proceeds from sale of land and equipment, net	5,960,000	7,224,000
Non-refundable deposit received	0	500,000
Purchases of equity investments	(316,000)	(14,000)
Proceeds from sale of equity investments	305,000	1,000
Net cash provided by investing activities	5,404,000	3,060,000
Financing activities:
Borrowings from revolving line of credit	3,880,000	4,120,000
Repayments on revolving line of credit	(3,880,000)	(4,120,000)
Repurchase of common stock	(94,000)	(528,000)
Credit facility fees	0	(35,000)
Net cash used in financing activities	(94,000)	(563,000)
Net increase in cash	13,750,000	833,000
Cash, beginning of period	7,577,000	3,951,000
Cash, end of period	21,327,000	4,784,000
Supplemental information:
Interest received	(10,000)	(10,000)
Income tax payments	302,000	1,752,000
Change in accounts payable for capital expenditures	$ 134,000	$ 1,315,000