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Impact on Previously Issued Financial Statements for the Correction of an Error, Revised Consolidated Statement of Comprehensive Income (Loss) (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Consolidated Statement of Comprehensive Income [Abstract]          
Net income (loss) $ (3,102,000) $ (2,527,000) $ (5,084,000) $ 10,888,000  
Comprehensive income (loss) $ (3,404,000) (2,197,000) $ (6,103,000) 12,171,000  
Historical Misapplication of GAAP Related to Timing of Recognizing Certain Expenses Incurred in Connection with New Business [Member]          
Consolidated Statement of Comprehensive Income [Abstract]          
Net income (loss)   (2,650,000)   10,368,000 $ 18,826,000
Comprehensive income (loss)   (2,320,000)   11,651,000 20,839,000
Historical Misapplication of GAAP Related to Timing of Recognizing Certain Expenses Incurred in Connection with New Business [Member] | As Previously Reported [Member]          
Consolidated Statement of Comprehensive Income [Abstract]          
Net income (loss)   (6,806,000)   7,121,000 16,316,000
Comprehensive income (loss)   (6,476,000)   8,404,000 18,329,000
Historical Misapplication of GAAP Related to Timing of Recognizing Certain Expenses Incurred in Connection with New Business [Member] | Adjustment [Member]          
Consolidated Statement of Comprehensive Income [Abstract]          
Net income (loss)   4,156,000   3,247,000 2,510,000
Comprehensive income (loss)   $ 4,156,000   $ 3,247,000 $ 2,510,000