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Impact on Previously Issued Financial Statements for the Correction of an Error, Revised Consolidated Statement of Cash Flow from Operating Activities (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 Cash Flow from Operating Activities [Abstract] |  |  |  |  |
Net income | $ (3,102,000) | $ (2,527,000) | $ (5,084,000) | $ 10,888,000 |
Deferred income taxes |  |  | (962,000) | (2,430,000) |
Income tax receivable |  |  | (4,921,000) | (69,000) |
Prepaid expenses and other current assets |  |  | 1,398,000 | (33,000) |
Other assets |  |  | (129,000) | (153,000) |
Accounts payable and accrued liabilities |  |  | 27,968,000 | (15,946,000) |
Long-term core inventory |  |  |  | 0 |
Net cash used in operating activities |  |  | $ (20,328,000) | (9,803,000) |
Historical Misapplication of GAAP Related to Timing of Recognizing Certain Expenses Incurred in Connection with New Business [Member] |  |  |  |  |
Consolidated Statement of Cash Flow from Operating Activities [Abstract] |  |  |  |  |
Net income |  | (2,650,000) |  | 10,368,000 | $ 18,826,000
Deferred income taxes |  |  |  | (2,714,000) | 1,495,000
Income tax receivable |  |  |  |  | (6,312,000)
Prepaid expenses and other current assets |  |  |  | (1,645,000) | (2,825,000)
Other assets |  |  |  | (163,000) | 404,000
Accounts payable and accrued liabilities |  |  |  | (15,946,000) | (11,671,000)
Long-term core inventory |  |  |  | (38,361,000) | (46,978,000)
Net cash used in operating activities |  |  |  | (9,803,000) | (13,944,000)
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 Cash Flow from Operating Activities [Abstract] |  |  |  |  |
Net income |  | (6,806,000) |  | 7,121,000 | 16,316,000
Deferred income taxes |  |  |  | (909,000) | 3,055,000
Income tax receivable |  |  |  |  | (6,081,000)
Prepaid expenses and other current assets |  |  |  | (2,093,000) | (2,507,000)
Other assets |  |  |  | 289,000 | (384,000)
Accounts payable and accrued liabilities |  |  |  | (15,647,000) | (11,621,000)
Long-term core inventory |  |  |  | (37,222,000) | (45,839,000)
Net cash used in operating activities |  |  |  | (9,803,000) | (13,944,000)
Historical Misapplication of GAAP Related to Timing of Recognizing Certain Expenses Incurred in Connection with New Business [Member] | Adjustment [Member] |  |  |  |  |
Consolidated Statement of Cash Flow from Operating Activities [Abstract] |  |  |  |  |
Net income |  | $ 4,156,000 |  | 3,247,000 | 2,510,000
Deferred income taxes |  |  |  | (1,805,000) | (1,560,000)
Income tax receivable |  |  |  |  | (231,000)
Prepaid expenses and other current assets |  |  |  | 448,000 | (318,000)
Other assets |  |  |  | (452,000) | 788,000
Accounts payable and accrued liabilities |  |  |  | (299,000) | (50,000)
Long-term core inventory |  |  |  | (1,139,000) | (1,139,000)
Net cash used in operating activities |  |  |  | $ 0 | $ 0

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