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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Reclassifications
The accompanying financial statements include reclassification from prior presentation as summarized below:

12/31/2018
As Reported		Reclassification12/31/2018
As Adjusted
(In thousands)
Balance Sheet
Current assets
  Cash and cash equivalents$81,368  $(7,378) $73,990  
  Restricted cash and cash equivalents—  7,378  7,378  
      Total current assets119,097  —  119,097  
      Total assets$156,039  $—  $156,039  
Schedule of Property, Plant, and Equipment
The estimated useful lives of property and equipment are principally as follows:

AssetUseful Life
Buildings39 years
Leasehold ImprovementsShorter of the estimated useful life or lease term
Aircraft20 years
Machinery & equipment
5 to 7 years
IT software and equipment
3 to 5 years
As of December 31, 2019 and 2018, property, plant, and equipment, net consists of the following :
As of December 31,
20192018
(In thousands)
Buildings$9,142  $9,142  
Leasehold improvements20,048  16,570  
Aircraft320  320  
Machinery and equipment33,608  22,114  
IT software and equipment17,151  13,602  
Construction in progress3,674  620  
83,943  62,368  
Less accumulated depreciation and amortization
(34,610) (28,154) 
Property, plant, and equipment, net
$49,333  $34,214  
Schedule of Fair Value of Assets Measured on Recurring Basis The following tables summarize the fair value of assets that are recorded in the Company’s Consolidated Balance Sheets as of December 31, 2019 and December 31, 2018 at fair value on a recurring basis:
Fair Value Measurements as of December 31, 2019
Level 1Level 2Level 3
(In thousands)
Assets
Money Market$423,149  $—  $—  
Certificate of deposit42,630  —  —  
Total assets at fair value$465,779  $—  $—  
Fair Value of Measurements as of December 31, 2018
Level 1Level 2Level 3
(In thousands)
Assets
Money Market$22,908  $—  $—  
Certificate of deposit24,277  —  —  
Total asset at fair value$47,185  $—  $—