Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information (Details)

v3.19.1
Business Segment Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Segment Reporting Information [Line Items]    
Revenues $ 150,112,000 $ 167,410,000
Interest income 133,000 56,000
Interest expense 2,808,000 2,997,000
Depreciation and amortization of intangible assets 8,838,000 6,734,000
Unallocated corporate activity 0  
Income (loss) before taxes, excluding unallocated corporate activity 11,136,000 11,595,000
U.S. Regions    
Segment Reporting Information [Line Items]    
Revenues 55,597,000 74,691,000
U.S. Federal    
Segment Reporting Information [Line Items]    
Revenues 43,057,000 47,785,000
Canada    
Segment Reporting Information [Line Items]    
Revenues 7,148,000 8,904,000
Non-Solar DG    
Segment Reporting Information [Line Items]    
Revenues 21,230,000 18,117,000
All Other    
Segment Reporting Information [Line Items]    
Revenues 23,080,000 17,913,000
Operating Segments | U.S. Regions    
Segment Reporting Information [Line Items]    
Revenues 55,597,000 74,691,000
Interest income 63,000 1,000
Interest expense 857,000 1,191,000
Depreciation and amortization of intangible assets 2,182,000 1,330,000
Income (loss) before taxes, excluding unallocated corporate activity (278,000) 4,618,000
Operating Segments | U.S. Federal    
Segment Reporting Information [Line Items]    
Revenues 43,057,000 47,785,000
Interest income 49,000 20,000
Interest expense 210,000 241,000
Depreciation and amortization of intangible assets 817,000 672,000
Income (loss) before taxes, excluding unallocated corporate activity 5,621,000 5,817,000
Operating Segments | Canada    
Segment Reporting Information [Line Items]    
Revenues 7,148,000 8,904,000
Interest income 0 0
Interest expense 164,000 484,000
Depreciation and amortization of intangible assets 275,000 289,000
Income (loss) before taxes, excluding unallocated corporate activity (289,000) (2,362,000)
Operating Segments | Non-Solar DG    
Segment Reporting Information [Line Items]    
Revenues 21,230,000 18,117,000
Interest income 21,000 35,000
Interest expense 1,577,000 1,081,000
Depreciation and amortization of intangible assets 5,216,000 4,064,000
Income (loss) before taxes, excluding unallocated corporate activity 1,381,000 2,610,000
Operating Segments | All Other    
Segment Reporting Information [Line Items]    
Revenues 23,080,000 17,913,000
Interest income 0 0
Interest expense 0 0
Depreciation and amortization of intangible assets 348,000 379,000
Income (loss) before taxes, excluding unallocated corporate activity 4,701,000 912,000
Unallocated corporate activity    
Segment Reporting Information [Line Items]    
Unallocated corporate activity $ (8,008,000) $ (6,869,000)