Need balance sheet analysis for this company (Northrop Grumman). Any significant events affected the balance sheet

Breakdown 12/31/2019 12/31/2018 12/31/2017 12/31/2016 Assets Current Assets Cash Cash And Cash Equivalents 2,245,000 1,579,000 11,225,000 2,541,000 Total Cash 2,245,000 1,579,000 11,225,000 2,541,000 Net Receivables 1,326,000 1,448,000 3,976,000 3,299,000 Inventory 783,000 654,000 780,000 816,000 Total Current Assets 10,685,000 9,680,000 16,349,000 6,856,000 Non-current assets Property, plant and equip... Gross property, plant and e... 14,273,000 11,741,000 9,291,000 8,419,000 Accumulated Depreciation -5,850,000 -5,369,000 -5,066,000 -4,831,000 Net property, plant and e... 8,423,000 6,372,000 4,225,000 3,588,000 Goodwill 18,708,000 18,672,000 12,455,000 12,450,000 Intangible Assets 1,040,000 1,372,000 Other long-term assets 1,725,000 1,463,000 1,413,000 1,258,000 Total non-current assets 30,404,000 27,973,000 18,568,000 18,758,000 Total Assets 41,089,000 37,653,000 34,917,000 25,614,000 Liabilities Current Liabilities Accounts Payable 2,226,000 2,182,000 1,661,000 1,554,000 Deferred revenues 2,237,000 1,917,000 1,617,000 1,471,000 Other Current Liabilities 3,106,000 2,499,000 2,305,000 1,263,000 Total Current Liabilities 9,434,000 8,274,000 6,965,000 5,630,000 Non-current liabilities Long Term Debt 12,770,000 13,883,000 14,399,000 7,058,000 Deferred taxes liabilities 108,000 Other long-term liabilities 1,779,000 1,446,000 994,000 849,000 Total non-current liabilities 22,836,000 21,192,000 20,904,000 14,725,000 Total Liabilities 32,270,000 29,466,000 27,869,000 20,355,000 Stockholders' Equity Common Stock 168,000 171,000 174,000 175,000 Retained Earnings 8,748,000 8,068,000 11,548,000 10,630,000 Accumulated other comprehe... -97,000 -52,000 -4,718,000 -5,546,000 Total stockholders' equity 8,819,000 8,187,000 7,048,000 5,259,000 Total liabilities and stockholde... 41,089,000 37,653,000 34,917,000 25,614,000