Note 7 - Unearned Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule Of Unearned Revenue [Table Text Block]

March 31, 2020	Transportation		Water		Specialty		Total
California	$	527,971	$	52,136	$	94,006	$	674,113
Federal		18,152		957		131,569		150,678
Heavy Civil		1,321,443		41,511		240,060		1,603,014
Midwest		208,872		150		140,461		349,483
Northwest		614,653		2,868		61,680		679,201
Water and Mineral Services		—		143,539		—		143,539
Total	$	2,691,091	$	241,161	$	667,776	$	3,600,028

December 31, 2019	Transportation		Water		Specialty		Total
California	$	525,641	$	19,950	$	100,019	$	645,610
Federal		14,139		1,041		153,563		168,743
Heavy Civil		1,480,367		47,046		243,329		1,770,742
Midwest		230,889		152		135,680		366,721
Northwest		547,020		4,545		61,706		613,271
Water and Mineral Services		—		152,141		—		152,141
Total	$	2,798,056	$	224,875	$	694,297	$	3,717,228

March 31, 2019 (As Restated)	Transportation		Water		Specialty		Total
California	$	402,112	$	7,314	$	69,068	$	478,494
Federal		126		1,717		134,605		136,448
Heavy Civil		1,423,909		16,827		—		1,440,736
Midwest		128,867		143		183,598		312,608
Northwest		361,661		1,759		71,878		435,298
Water and Mineral Services		—		193,915		—		193,915
Total	$	2,316,675	$	221,675	$	459,149	$	2,997,499